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Volumn 352, Issue 6, 2010, Pages 999-1013

Copper-catalyzed asymmetric allylic alkylation of halocrotonates: Efficient synthesis of versatile chiral multifunctional building blocks

Author keywords

Asymmetric catalysis; Carbon carbon bond formation; Copper catalysis; Grignard reagents; Multifunctional building blocks

Indexed keywords


EID: 77951189111     PISSN: 16154150     EISSN: 16154169     Source Type: Journal    
DOI: 10.1002/adsc.201000109     Document Type: Article
Times cited : (45)

References (136)
  • 13
    • 22744434029 scopus 로고    scopus 로고
    • Angew. Chem. Int. Ed. 2005, 44, 4627-4631;
    • (2005) Angew. Chem. Int. Ed. , vol.44 , pp. 4627-4631
  • 23
  • 28
    • 72949098642 scopus 로고    scopus 로고
    • Angew. Chem. Int. Ed. 2009, 48, 9339-9341;
    • (2009) Angew. Chem. Int. Ed. , vol.48 , pp. 9339-9341
  • 32
    • 38049058696 scopus 로고    scopus 로고
    • Angew. Chem. Int. Ed 2008, 47, 398-401.
    • (2008) Angew. Chem. Int. Ed , vol.47 , pp. 398-401
  • 36
    • 77951185977 scopus 로고    scopus 로고
    • th 2010) identified 1563 natural products for a-Me-butyric acid with either a single or double bond and free sites at both the 4-position and the carboxylic acid moiety
    • th 2010) identified 1563 natural products for a-Me-butyric acid with either a single or double bond and free sites at both the 4-position and the carboxylic acid moiety.
  • 37
    • 67549085248 scopus 로고    scopus 로고
    • For recent selected examples of the synthesis of a-Mecarbonyls see: a) S.-M. Lei, C. Boim, Angew. Chem. 2008, 120, 9052-9055;
    • (2008) Angew. Chem. , vol.120 , pp. 9052-9055
    • Lei, S.-M.1    Boim, C.2
  • 38
    • 57349098769 scopus 로고    scopus 로고
    • Angew. Chem. Int. Ed. 2008, 47, 8920-8923;
    • (2008) Angew. Chem. Int. Ed. , vol.47 , pp. 8920-8923
  • 40
  • 42
    • 53549086402 scopus 로고    scopus 로고
    • Angew. Chem. Int. Ed. 2008, 47, 1741-1744;
    • (2008) Angew. Chem. Int. Ed. , vol.47 , pp. 1741-1744
  • 46
    • 77951160836 scopus 로고    scopus 로고
    • This substrate was chosen mainly due to its physical properties (i.e., UV activity and low volatility)
    • This substrate was chosen mainly due to its physical properties (i.e., UV activity and low volatility).
  • 47
    • 0032869585 scopus 로고    scopus 로고
    • [3b] on (E)-[(4-bromobut-2-enyloxy)methyl]benzene might be performed, followed by deprotection of the hydroxy group and finally Jones oxidation as described in: T. Tashiro, K. Mori, Eur. J. Org. Chem. 1999, 2167-2173.
    • (1999) Eur. J. Org. Chem. , pp. 2167-2173
    • Tashiro, T.1    Mori, K.2
  • 49
    • 77951198251 scopus 로고    scopus 로고
    • The formation of the cyclopropane product 8b can be optimized and will be reported in due course
    • The formation of the cyclopropane product 8b can be optimized and will be reported in due course.
  • 50
    • 77951166336 scopus 로고    scopus 로고
    • Benzyl crotonate is formed via Br-Mg exchange and subsequent quenching during work-up. Studies on this reagent will be disclosed shortly
    • Benzyl crotonate is formed via Br-Mg exchange and subsequent quenching during work-up. Studies on this reagent will be disclosed shortly.
  • 51
    • 77951150687 scopus 로고    scopus 로고
    • The reaction has been performed at 10 mmol scale as well and gave 88% yield and 96% ee. By improving the experimental conditions (presumably longer addition of the substrate to the reaction mixture is required) higher ee might be obtained
    • The reaction has been performed at 10 mmol scale as well and gave 88% yield and 96% ee. By improving the experimental conditions (presumably longer addition of the substrate to the reaction mixture is required) higher ee might be obtained.
  • 52
    • 77951179784 scopus 로고    scopus 로고
    • Apparently allowing the reaction to proceed for 40 h gives slightly lower yield. The slightly lower ee might be explained by analysis issues due to overlapping of the large first peak and small second peak for this enantiomer on the chiral HPLC
    • Apparently allowing the reaction to proceed for 40 h gives slightly lower yield. The slightly lower ee might be explained by analysis issues due to overlapping of the large first peak and small second peak for this enantiomer on the chiral HPLC.
  • 56
    • 77951148651 scopus 로고    scopus 로고
    • [9b]
    • [9b];
  • 58
    • 77951187824 scopus 로고    scopus 로고
    • [9e]
    • [9e]
  • 61
    • 77951176875 scopus 로고    scopus 로고
    • With respect to the higher ee measured for the iodolactonization products (vide infra) there might be a small impurity under the minor peak on the chiral GC and the ee might be higher
    • With respect to the higher ee measured for the iodolactonization products (vide infra) there might be a small impurity under the minor peak on the chiral GC and the ee might be higher.
  • 66
    • 77951159168 scopus 로고    scopus 로고
    • Storage of 12 for extended time at -20̈C (checked after 7 days) also gives lactonization
    • Storage of 12 for extended time at -20̈C (checked after 7 days) also gives lactonization.
  • 67
    • 77951150975 scopus 로고    scopus 로고
    • This type of building block has been obtained (1) from the chiral pool
    • This type of building block has been obtained (1) from the chiral pool:
  • 79
    • 15544366001 scopus 로고    scopus 로고
    • Angew. Chem. Int. Ed. 2005, 44, 1118-1121;
    • (2005) Angew. Chem. Int. Ed. , vol.44 , pp. 1118-1121
  • 94
    • 57049083468 scopus 로고    scopus 로고
    • Angew. Chem. Int. Ed. 2008, 47, 9734-9738.
    • (2008) Angew. Chem. Int. Ed. , vol.47 , pp. 9734-9738
  • 96
    • 77951159167 scopus 로고    scopus 로고
    • This kind of building block has been obtained (1) using chiral auxiliaries
    • This kind of building block has been obtained (1) using chiral auxiliaries:
  • 102
    • 77951146283 scopus 로고    scopus 로고
    • This kind of cyclic building block has been obtained (1) enzymatically
    • This kind of cyclic building block has been obtained (1) enzymatically:
  • 108
    • 77951199141 scopus 로고    scopus 로고
    • The observed enantioselectivities in this reaction are representative for terminal olefins
    • The observed enantioselectivities in this reaction are representative for terminal olefins.
  • 110
    • 0000383342 scopus 로고    scopus 로고
    • Angew. Chem. Int. Ed. 2001, 40, 2063-2066;
    • (2001) Angew. Chem. Int. Ed. , vol.40 , pp. 2063-2066
  • 113
    • 34447503804 scopus 로고    scopus 로고
    • According to the literature, the 5-membered lactone products possess the all-trans configuration: J.-M. Garnier, S. Robin, R. Guillot, G. Rousseau, Tetrahedron: Asymmetry 2007, 75, 1434-1442. In NOESY-NMR experiments for 19 [(3R,4S')-4-iodo-3-methyldihydrofuran-2(3//)-one] we found a stronger coupling between one of C5 protons and the C4 proton and a weaker coupling with the other C5 proton and the C4 proton. The weaker coupling is as strong as the coupling of the protons of C4 and C3. For 22 [(3R,4S,5R)-5-hexyl-4iodo-3- methyldihydrofuran-2(377)-one] we found a weak coupling between the protons of C5 and C4 and a coupling similar in strength for the C4 and C3 protons. In combination with the expected irans-conformation for the protons of C4 and C5 arising from inti-addition of the carboxylate on the iodonium intermediate this most likely indicates an all-trans conformation of both 19 and 22.
    • (2007) Tetrahedron: Asymmetry , vol.75 , pp. 1434-1442
    • Garnier, J.-M.1    Robin, S.2    Guillot, R.3    Rousseau, G.4
  • 114
    • 77951195551 scopus 로고    scopus 로고
    • The bromo substituted 4-membered lactone can also be synthesized
    • The bromo substituted 4-membered lactone can also be synthesized:
  • 118
    • 77951182780 scopus 로고    scopus 로고
    • N2 attack of the carboxylate on the terminal iodoalkane
    • N2 attack of the carboxylate on the terminal iodoalkane.
  • 122
    • 77951184021 scopus 로고    scopus 로고
    • 2 used for the work-up of this reaction
    • 2 used for the work-up of this reaction.
  • 123
    • 0026517333 scopus 로고
    • This procedure was based on a procedure described in: S. Liu, R. P. Hanzlik J. Med. Chem. 1992, 35, 1067-1075.
    • (1992) J. Med. Chem. , vol.35 , pp. 1067-1075
    • Liu, S.1    Hanzlik, R.P.2
  • 131
    • 77951180710 scopus 로고    scopus 로고
    • Occasionaly the product was polluted with 2,6dichlorobenzoquinone, in these cases a yellow oil was obtained
    • Occasionaly the product was polluted with 2,6dichlorobenzoquinone, in these cases a yellow oil was obtained.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.