메뉴 건너뛰기




Volumn 71, Issue 19, 2006, Pages 7494-7497

Stereoselective synthesis of highly functionalized nitrocyclopropanes via organocatalyic conjugate addition to nitroalkenes

Author keywords

[No Author keywords available]

Indexed keywords

AMINES; CATALYSIS; NITROGEN COMPOUNDS; OLEFINS; REACTION KINETICS; SYNTHESIS (CHEMICAL);

EID: 33749008198     PISSN: 00223263     EISSN: None     Source Type: Journal    
DOI: 10.1021/jo0613838     Document Type: Article
Times cited : (144)

References (66)
  • 8
    • 0038301130 scopus 로고    scopus 로고
    • For reviews on the synthesis and applications of cyclopropyl derivatives of β-amino acids see: (a) Gnad, F.; Reiser, O. Chem. Rev. 2003, 103, 1603.
    • (2003) Chem. Rev. , vol.103 , pp. 1603
    • Gnad, F.1    Reiser, O.2
  • 27
    • 29844434876 scopus 로고    scopus 로고
    • Charette recently reported the efficient Cu-catalyzed asymmetric synthesis of 1-nitro-cyclopropylcarboxylates from electron-rich olefins: Moreau, B.; Charette, A. B. J. Am. Chem. Soc. 2005, 127, 18014.
    • (2005) J. Am. Chem. Soc. , vol.127 , pp. 18014
    • Moreau, B.1    Charette, A.B.2
  • 38
    • 1242352457 scopus 로고    scopus 로고
    • For alternative preparations of nitrocyclopropanes from nonnitroolefin sources see: (a) Wurz, R. P.; Charette, A. B. J. Org. Chem. 2004, 69, 1262.
    • (2004) J. Org. Chem. , vol.69 , pp. 1262
    • Wurz, R.P.1    Charette, A.B.2
  • 51
    • 33746277515 scopus 로고    scopus 로고
    • Recent reviews of hydrogen bond-faciltated organocatalysis: (a) Connon, S. J. Chem.-Eur. J. 2006, 12, 5418.
    • (2006) Chem.-Eur. J. , vol.12 , pp. 5418
    • Connon, S.J.1
  • 58
  • 59
    • 0001396269 scopus 로고
    • N2-type reactions relative to more common polar aprotic solvents (such as MeCN and THF), alternative mechanisms involving DBU-mediated halogen transfer cannot be ruled out at this time. It is interesting to note that DBU is also an excellent base for the Bingel reaction, see: (a) Bingel, C. Chem. Ber. 1993, 126, 1957.
    • (1993) Chem. Ber. , vol.126 , pp. 1957
    • Bingel, C.1
  • 61
    • 0001517108 scopus 로고
    • Kohler found that an α-bromoadduct similar to 8 could be cyclized in poor yield (>30%) on reflux in excess methanolic KOAc (see ref 20d). A later report suggested that a p-Me analogue of 4 could be prepared via electroreduction of the chloromalonate in the presence of the Michael acceptor (no yield given): Le Menn, J.-C.; Tallec, A.; Sarrazin, J. Can. J. Chem. 1991, 69, 761.
    • (1991) Can. J. Chem. , vol.69 , pp. 761
    • Le Menn, J.-C.1    Tallec, A.2    Sarrazin, J.3
  • 62
    • 0028340917 scopus 로고
    • For a useful oxidative cyclization using KF/alumina of the Michael adducts between malonate esters and electron deficient olefins (including nitroolefins): Villemin, D.; Thibault-Starzyk, F.; Hachemi, M. Synth. Commun. 1994, 24, 1425.
    • (1994) Synth. Commun. , vol.24 , pp. 1425
    • Villemin, D.1    Thibault-Starzyk, F.2    Hachemi, M.3
  • 63
    • 33748995968 scopus 로고    scopus 로고
    • note
    • See Supporting Information for details.
  • 64
    • 33749027248 scopus 로고    scopus 로고
    • note
    • The Michael addition reaction promoted by 6 and 7 proceeded to completion in all cases.
  • 65
    • 33749020586 scopus 로고    scopus 로고
    • note
    • It is interesting to note that the quinidine derived DHQD furnished the same major product enantiomer as the quinine-derived 6. This is contrary to the trend previously observed in the corresponding catalyzed addition of dimethyl malonate to 2 (see ref 21a).
  • 66
    • 33749003220 scopus 로고    scopus 로고
    • note
    • Racemization of the product by DBU has been discounted as the ee of enantioenriched 4 remained unchanged after stirring in THF (1.0 M) in the presence of DBU (1.0 equiv) for 24 h at room temperature.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.