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Volumn 64, Issue 7, 2008, Pages 1536-1547

Studies on the origin of cis-diastereoselectivity of the titanium-mediated cyclopropanation of carboxylic esters with Grignard reagents. Stereochemistry of the intramolecular cyclization of β-metalloketones

Author keywords

Ate complexes; Cyclopropanols; Diastereoselectivity; Titanacyclopropanes

Indexed keywords

1 IODO 2 METHYLHEXAN 3 ONE; 1 IODO 2,4 DIMETHYLPENTAN 3 ONE; 1 IODO 2,4,4 TRIMETHYLPENTAN 3 ONE; 1 ISOPROPYL 2 METHYLCYCLOPROPANOL; 1 METHYL 2 PROPYL 1 TRIMETHYLSILOXY CYCLOPROPANE; 1 METHYL 2 PROPYLCYCLOPROPANOL; 1 TERT BUTYL 2 ISOPROPYLCYCLOPROPANOL; 1 TERT BUTYL 2 METHYL 1 TRIMETHYLSILOXY CYCLOPROPANE; 1 TERT BUTYL 2 METHYLCYCLOPROPANOL; 1 TERT BUTYL 2 PROPYLCYCLOPROPANOL; 1 TERT BUTYL 2,3,3 TRIDEUTERIO 2 TRIDEUTERIOMETHYLCYCLOPROPANOL; 1,2 DIISOPROPYLCYLOPROPANOL; 2 IODOHEPTAN 4 ONE; 2 ISOPROPYL 1 METHYLCYCLOPROPANOL; 2 METHYL 1 PROPYLCYCLOPROPANOL; 3 IODOMETHYLHEXAN 2 ONE; 4 IODOHEPTAN 2 ONE; 5 IODO 2 METHYLHEXAN 3 ONE; 5 IODO 2,2 DIMETHYLHEXAN 3 ONE; CYCLOPROPANE; ESTER DERIVATIVE; KETONE DERIVATIVE; UNCLASSIFIED DRUG;

EID: 37649000174     PISSN: 00404020     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.tet.2007.10.075     Document Type: Article
Times cited : (27)

References (81)
  • 9
    • 37649007525 scopus 로고    scopus 로고
    • For reviews see:
  • 13
    • 37649005364 scopus 로고    scopus 로고
    • note
    • A modified ate complex mechanism, assuming the formation of octahedral titanium intermediates, was proposed recently for this reaction (see Ref. 6).
  • 16
    • 37648999268 scopus 로고    scopus 로고
    • For the formation of trans-1,2-disubstituted cyclopropanols as major products in reactions between esters and alkoxytitanacyclopropane reagents bearing functional substituents, see:
  • 25
    • 37649010071 scopus 로고    scopus 로고
    • The same regioselectivity was observed in the titanium-mediated couplings of alkenes:
  • 30
    • 37649024550 scopus 로고    scopus 로고
    • The formation of oxatitanacyclopentane or azatitanacyclopentane intermediates with the metal atom bound to secondary carbon were evidenced in the reactions of alkoxytitanacyclopropane reagents with ketones, imides, N-acylpyrroles as well as nitriles:
  • 35
    • 34147093658 scopus 로고    scopus 로고
    • Synthesis of β-iodoketones by oxidation of iodide anion by ceric ammonium nitrare (CAN) in the presence of substituted cyclopropyl alcohols was recently reported:
    • Synthesis of β-iodoketones by oxidation of iodide anion by ceric ammonium nitrare (CAN) in the presence of substituted cyclopropyl alcohols was recently reported:. Jiao J., Nguyen L.X., Patterson D.R., and Flowers II R.A. Org. Lett. 9 (2007) 1323
    • (2007) Org. Lett. , vol.9 , pp. 1323
    • Jiao, J.1    Nguyen, L.X.2    Patterson, D.R.3    Flowers II, R.A.4
  • 36
    • 37649000284 scopus 로고    scopus 로고
    • For the synthesis of β-iodoketons from α,β-unsaturated ketones, see:
  • 40
    • 0029002874 scopus 로고
    • Stereochemistry of the intermolecular cyclization of the methyl substituted β-zinc propionates in the presence of tert-butyldimethylchlorosilane was studied by Tamaru, et al.:
    • Stereochemistry of the intermolecular cyclization of the methyl substituted β-zinc propionates in the presence of tert-butyldimethylchlorosilane was studied by Tamaru, et al.:. Yasui K., Tanaka S., and Tamaru Y. Tetrahedron 51 (1995) 6881
    • (1995) Tetrahedron , vol.51 , pp. 6881
    • Yasui, K.1    Tanaka, S.2    Tamaru, Y.3
  • 41
    • 37649011729 scopus 로고    scopus 로고
    • Narasimhan and Patil reported synthesis of a steroid cyclopropyl alcohol, 1-phenylcyclopropanol and the bicyclic cyclopropanol by the reaction between the corresponding β-iodoketons and excess of zinc powder in the presence of trimethylchlorosilane:
  • 44
    • 33845279644 scopus 로고
    • Yoshida et al. reported the formation of 1-phenylcyclopropanol as major product when 3-iodo-1-phenylpropan-1-one was converted into the corresponding β-zincketone by the metalation with Zn-Cu couple:
    • Yoshida et al. reported the formation of 1-phenylcyclopropanol as major product when 3-iodo-1-phenylpropan-1-one was converted into the corresponding β-zincketone by the metalation with Zn-Cu couple:. Ochiai H., Nishihara T., Tamaru Y., and Yoshida Z. J. Org. Chem. 53 (1988) 1343
    • (1988) J. Org. Chem. , vol.53 , pp. 1343
    • Ochiai, H.1    Nishihara, T.2    Tamaru, Y.3    Yoshida, Z.4
  • 45
    • 37649000884 scopus 로고    scopus 로고
    • note
    • The corresponding saturated ketones (1-10%) were detected as by-products.
  • 46
    • 37649021452 scopus 로고    scopus 로고
    • note
    • Addition of 2-3 equiv of triethylamine before the aqueous work-up led to TMS-derivative of alcohol 2a.
  • 47
    • 37649008174 scopus 로고    scopus 로고
    • 15 It was reported also that TMSCl could activate zinc dust:
  • 49
    • 4243489506 scopus 로고
    • and references cited therein
    • Knochel P., and Singer R.D. Chem. Rev. 93 (1993) 2117 and references cited therein
    • (1993) Chem. Rev. , vol.93 , pp. 2117
    • Knochel, P.1    Singer, R.D.2
  • 50
    • 37649013128 scopus 로고    scopus 로고
    • note
    • For the analysis of steric interactions in transition states of the intramolecular cyclizations of β-zincesters, see Ref. 15.
  • 51
    • 37649024668 scopus 로고    scopus 로고
    • note
    • For the generation of titanoketone and titanoester intermediates from the corresponding organozinc compounds, see Ref. 17.
  • 54
    • 0037424030 scopus 로고    scopus 로고
    • The formation of 1-cyclohexylcyclopropanol from corresponding β-chloroketone under the same conditions has been observed in first by Olliver:
    • The formation of 1-cyclohexylcyclopropanol from corresponding β-chloroketone under the same conditions has been observed in first by Olliver:. Lecornue F., and Ollivier J. Chem. Commun. (2003) 584
    • (2003) Chem. Commun. , pp. 584
    • Lecornue, F.1    Ollivier, J.2
  • 55
    • 37649011585 scopus 로고    scopus 로고
    • note
    • 2, and of EtMgBr, see Ref. 23.
  • 63
    • 0001740014 scopus 로고
    • Grubbs et al. found no deuterium isotope effect on the stereochemistry of an alkenyl ligand cyclization in titanocene alkenyl chlorides:
    • Grubbs et al. found no deuterium isotope effect on the stereochemistry of an alkenyl ligand cyclization in titanocene alkenyl chlorides:. Clawson L., Soto J., Buchwald S.L., Steigerwald M.L., and Grubbs R.H. J. Am. Chem. Soc. 107 (1985) 3377
    • (1985) J. Am. Chem. Soc. , vol.107 , pp. 3377
    • Clawson, L.1    Soto, J.2    Buchwald, S.L.3    Steigerwald, M.L.4    Grubbs, R.H.5
  • 64
    • 0000936656 scopus 로고
    • 2-1,5-hexadiene revealed ratio of 1.2:1 trans:cis products, and this stereochemical result was attributed to preference for H, rather than for D, to occupy bridging α-agostic position in the transition state of cyclopentane ring closing step:
    • 2-1,5-hexadiene revealed ratio of 1.2:1 trans:cis products, and this stereochemical result was attributed to preference for H, rather than for D, to occupy bridging α-agostic position in the transition state of cyclopentane ring closing step:. Piers W.E., and Bercaw J.E. J. Am. Chem. Soc. 112 (1990) 9406
    • (1990) J. Am. Chem. Soc. , vol.112 , pp. 9406
    • Piers, W.E.1    Bercaw, J.E.2
  • 66
    • 33751351321 scopus 로고    scopus 로고
    • The absence of any kind of bond linking the metal atom and α-hydrogen in titanium alkyl complexes was concluded recently from the computational results. The authors recommended to avoid use the term 'α-agostic bond' and the alternative expression 'α-agostic geometry' was proposed to eliminate possible misunderstanding:
    • The absence of any kind of bond linking the metal atom and α-hydrogen in titanium alkyl complexes was concluded recently from the computational results. The authors recommended to avoid use the term 'α-agostic bond' and the alternative expression 'α-agostic geometry' was proposed to eliminate possible misunderstanding:. Vidal I., Melchor S., Alkorta I., Elguero J., Sundberg M.R., and Dobado J.A. Organometallics 25 (2006) 5638
    • (2006) Organometallics , vol.25 , pp. 5638
    • Vidal, I.1    Melchor, S.2    Alkorta, I.3    Elguero, J.4    Sundberg, M.R.5    Dobado, J.A.6
  • 72
    • 37649013414 scopus 로고    scopus 로고
    • For a preferred formation of tetrahedral configuration for zinc and magnesium organometallics in ether solvents see, for example:
  • 73
    • 37649014313 scopus 로고
    • Metallorganische Verbindungen Be, Mg, Ca, Sr, Ba, Zn, Cd
    • Georg Thieme, Stuttgart
    • Metallorganische Verbindungen Be, Mg, Ca, Sr, Ba, Zn, Cd. Methoden der Organischen Chemie (Houben-Weyl) Vol. XII/2a (1973), Georg Thieme, Stuttgart
    • (1973) Methoden der Organischen Chemie (Houben-Weyl) , vol.XII-2a
  • 78
    • 37649022712 scopus 로고    scopus 로고
    • note
    • 6 The NMR yields and diastereomer ratios were virtually the same as obtained by standard stoichiometric procedure described in this work.
  • 79
    • 37649016430 scopus 로고    scopus 로고
    • note
    • Control experiment with undeuterated Grignard reagent was also performed under the same conditions.


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