Stereochemistry of addition of allylic Grignard reagents to .alpha.,.beta.-ethylenic ketones
摘要:
The stereochemistry of the addition of allylic Grignard reagents, (mainly crotylmagnesium chloride) to various conjugated enones has been investigated and a compact transition state is postulated. For s-cis-enones bearing no bulky substituents, a boat transition state, involving a trans-crotylmagnesium chloride, occurs leading to erythro-1,5-hexadien-3-ols as the major or only product.
Ozonolysis; intramolecular trapping of the “Criegee intermediate”. X-Ray analysis and anomeric effect in a 6-hydroxy-3-methoxy-1,2-dioxane
作者:Marcel Pierrot、Mostafa El Idrissi、Maurice Santelli
DOI:10.1016/s0040-4039(00)95228-6
日期:1989.1
Ozonolysis of (1-methyl-2-propen-yl)-pulegol in methanol solution gives an endoperoxide bearing the 6-hydroxy-3-methoxy-1,2-dioxane ring. X-Rayanalysis reveals the presence of - and -anomeric effect.
Treatment of 1-allyl-2-alkenylidenecyclohexanols in acetic acid by the Pd(0) complex [Pd(Ph3P)4] led to 8-methyl bicyclo[4.3.0]nona-1(6),7-dienes. In contrast, only few examples of cyclization vs elimination were observed in acyclic 1,5-hexadien-3-ols.
Zair Touriya, Santelli-Rouvier Christiane, Santelli Maurice, J. Org. Chem, 58 (1993) N 10, S 2686-2693
作者:Zair Touriya, Santelli-Rouvier Christiane, Santelli Maurice
DOI:——
日期:——
EL, IDRISSI MOSTAFA;SANTELLI, MAURICE, J. ORG. CHEM., 53,(1988) N 5, 1010-1016