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Volumn 58, Issue 5, 1993, Pages 1207-1214

Syn-SN2′ Pathway in the Reaction of Certain γ-(Mesyloxy) α,β-Enoates with RCu(CN)MgX·BF3 Reagents. Importance of MgX and Bulky R Group upon the Diastereoselectivity

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EID: 0001388469     PISSN: 00223263     EISSN: 15206904     Source Type: Journal    
DOI: 10.1021/jo00057a038     Document Type: Article
Times cited : (48)

References (79)
  • 58
    • 0026606229 scopus 로고
    • For a recent report, see, and references cited therein
    • For a recent report, see: Coleman, R. S.; Carpenter, A. J. Tetrahedron Lett. 1992, 33, 1697 and references cited therein.
    • (1992) Tetrahedron Lett. , vol.33 , pp. 1697
    • Coleman, R.S.1    Carpenter, A.J.2
  • 70
    • 0000918571 scopus 로고
    • As shown in Figure 5, for the stereochemistry of the tert-butoxycarbonyl group, two stereoisomers (A and B) can be drawn. The carbon atoms (C-2, C-4, and C-1′), the nitrogen atom, and the oxygen atoms (O-2′ and O-3′) would lie nearly on the same plane, (see
    • As shown in Figure 5, for the stereochemistry of the tert-butoxycarbonyl group, two stereoisomers (A and B) can be drawn. The carbon atoms (C-2, C-4, and C-1′), the nitrogen atom, and the oxygen atoms (O-2′ and O-3′) would lie nearly on the same plane, (see: Hondrelis, J.; Lonergan, G.; Voliotis, S.; Matsoukas, J. Tetrahedron 1990, 46, 565.
    • (1990) Tetrahedron , vol.46 , pp. 565
    • Hondrelis, J.1    Lonergan, G.2    Voliotis, S.3    Matsoukas, J.4
  • 71
    • 1542588019 scopus 로고
    • See also, Conformer B would be destabilized in comparison with A owing to unfavorable interactions between the bulky tert-butyl group and the gem-dimethyl group at the C-2 position. The NOESY spectrum and the selective decoupling experiment of 4 clearly indicated a NOE between the protons of the tert-butyl group and the proton on C-4 in Figure 5A. Furthermore, the crystal structure of 23 (Figure 1) shows that the stereochemistry of the Boc group in 23 is essentially the same as shown in structure A. (Figure presented.)
    • See also: Shustov, G. V.; Kadorkina, G. K.; Varlamov, S. V.; Kachanov, A. V.; Kostyanovsky, R. G.; Rauk, A. J. Am. Chem. Soc. 1992, 114, 1616). Conformer B would be destabilized in comparison with A owing to unfavorable interactions between the bulky tert-butyl group and the gem-dimethyl group at the C-2 position. The NOESY spectrum and the selective decoupling experiment of 4 clearly indicated a NOE between the protons of the tert-butyl group and the proton on C-4 in Figure 5A. Furthermore, the crystal structure of 23 (Figure 1) shows that the stereochemistry of the Boc group in 23 is essentially the same as shown in structure A. (Figure presented.)
    • (1992) J. Am. Chem. Soc. , vol.114 , pp. 1616
    • Shustov, G.V.1    Kadorkina, G.K.2    Varlamov, S.V.3    Kachanov, A.V.4    Kostyanovsky, R.G.5    Rauk, A.6


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.