SEQUENTIAL [2,3]WITTIG AND CLAISEN REARRANGEMENT: A FACILE SYNTHETIC METHOD FOR (E,E)-4,7-ALKADIENALS AND -ALKADIENOIC ACIDS. A NEW FORMAL SYNTHESIS OF (±)-CERULENIN
Four newsigmatropicsequences triggered by the regiocontrolled [2,3]-Wittig rearrangement of unsymmetrical bis-allylic ethers (1) to the l,5-dien-3-ols (2) arc described, which provide unique, regiocontrolled methods for the synthesis of a wide variety of unsaturatedcarbonylcompounds possessing interesting molecular frameworks. The newly developed sequences include the [2,3]-Wittig-Claisen, the
A convergent asymmetric synthesis of γ-butenolides
作者:Marc Renard、Léon A. Ghosez
DOI:10.1016/s0040-4020(01)00078-3
日期:2001.3
The addition of aldehydes to the new enantiomerically pure lithiated sulfoxide-orthoester 13 yielded gamma -butenolides of high enantiomeric purities after elimination of phenylsulfinic acid. The cyclocondensation with ketones was less stereoselective. This new asymmetric synthesis of gamma -butenolides has been applied to a convergent preparation of the antifungal antibiotic (+)-cerulenin. (C) 2001 Elsevier Science Ltd. All rights reserved.
Chattopadhyay, A.; Mamdapur, V. R., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1987, vol. 26, # 1-12, p. 161 - 162
作者:Chattopadhyay, A.、Mamdapur, V. R.
DOI:——
日期:——
MIKAMI KOICHI; KISHI NAOYUKI; NAKAI TAKESHI; FUJITA YOSHIJI, TETRAHEDRON, 42,(1986) N 11, 2911-2918
作者:MIKAMI KOICHI、 KISHI NAOYUKI、 NAKAI TAKESHI、 FUJITA YOSHIJI
DOI:——
日期:——
CHATTOPADHYAY, A.;MAMDAPUR, V. R., INDIAN J. CHEM., 26,(1987) N 2, 161-162