The synthesis of a key intermediate in the total synthesis of insect antifeedant clerodanes
作者:Jan Vader、Lucas L. Doddema、Rob M. Peperzak、Aede de Groot、Jan M.M. Smits、Paul T. Beurskens
DOI:10.1016/s0040-4020(01)89504-1
日期:1989.1
The synthesis of a key intermediate, 1,2,3,4,4a,5,6,7,8,8aβ-perhydro-4α-isopropyldimethylsilyloxy-4aα-isopropyldimethylsilyloxy-methyl-1α,2α-dimethyl-5-methylene-naphthalene-1β-carbaldehyde 31, in the total synthesis of insect antifeedant clerodanes is described. The stereochemistry of this intermediate is proven by an X-ray analysis of one of its precursors e.g. 10α-acetoxy-7β-(1,3-dioxolan-2-yl)-3
关键中间体1,2,3,4,4a,5,6,7,8,8aβ-全氢-4α-异丙基二甲基甲硅烷氧基-4aα-异丙基二甲基甲硅烷氧基-甲基-1α,2α-二甲基-5-亚甲基-萘的合成-1β-甲醛31,在昆虫拒食性科达罗酮的全合成中被描述。该中间体的立体化学通过其前体之一的X射线分析证明,例如10α-乙酰氧基-7β-(1,3-二氧杂戊环-2-基)-3,3aβ,4,5,6,6aβ,7 ,8,9,10-八氢-7α,8α-二甲基-1H-萘[1,8aα-c]呋喃25。晶体数据:C 19 H 30 O 5。单斜晶,P2 1 / n,晶胞尺寸:a = 7.9714(4),b = 11.1722(4),c = 19.7783(5)Å,β= 92.595(5)°,Z = 4; 常规R因子= 0.053。