α-Carbonyl Radical Cyclization Approach toward Angular Triquinanes: Total Synthesis of Enantiomerically Pure (−)-5-Oxosilphiperfol-6-ene
作者:Chin-Kang Sha、K. C. Santhosh、Shin-Hong Lih
DOI:10.1021/jo9723570
日期:1998.4.1
An alpha-carbonyl radical cyclization approach toward synthesis of angular triquinanes is described. As a model study, conjugateaddition of 4-(trimethylsilyl)-3-butynylmagnesium chloride to enone 7 followed by trapping of the enolate with chlorotrimethylsilane gave trimethysilyl enolether 8. Iodination of 8 with a mixture of NaI and m-CPBA afforded iodo ketone 6. Radical cyclization of 6 effected
BRASILI, L.;LEONELLI, M.;GIANNELLA, M., FARMACO. ED. SCI., 1982, 37, N 7, 431-437
作者:BRASILI, L.、LEONELLI, M.、GIANNELLA, M.
DOI:——
日期:——
Synthesis of Methyl-substituted 1-Cyclopentene-1-carboxylates and Related Compounds
作者:Akira Takeda、K\={o}ichi Shinhama、Sadao Tsuboi
DOI:10.1246/bcsj.50.1831
日期:1977.7
The treatment of methyl-substituted 1-chloro-2-oxo-1-cyclohexanecarboxylic esters (7a–e) with anhydrous Na2CO3 in refluxing xylene gave the corresponding methyl-substituted 1-cyclopentene-1-carboxylic esters (1a–e). Several intermediates important in the synthesis of natural products, such as 4,4-dimethyl-1-cyclopentene-1-carbaldehyde (9), 5-methyl-1-cyclopentene-1-carbaldehyde (12), α-(3-methyl-1