STUDIES ON THE SYNTHESIS OF THE SPIROKETAL FRAGMENT OF AZADIRACHTIN(Ⅰ)

STUDIES ON THE SYNTHESIS OF THE SPIROKETAL FRAGMENT OF AZADIRACHTIN(Ⅰ)

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摘要 The stereoselective synthesis of substituted [2,2,1]-bicyclo- heptan-2-one 12,a supposed intermediate to the spiroketal fragment of azadi- rachtin was described.When 12 was treated with mCPBA in CH_2Cl_2 in the pres- ence of excess amount of solid sodium bicarbonate,only 13 was obtained.The spiroketal intermediate 20 was converted from 9 through 5 steps by an alterna- tive route. The stereoselective synthesis of substituted [2,2,1]-bicyclo- heptan-2-one 12,a supposed intermediate to the spiroketal fragment of azadi- rachtin was described.When 12 was treated with mCPBA in CH_2Cl_2 in the pres- ence of excess amount of solid sodium bicarbonate,only 13 was obtained.The spiroketal intermediate 20 was converted from 9 through 5 steps by an alterna- tive route.

作者 Xiao Tao CHEN Yi Lin LUO Qi Bin ZHU Zhi Qin WANG Shanghai Institute of Organic Chemistry Chinese Academy of Sciences 345 Lingling Lu,Shanghai 200032

出处《Chinese Chemical Letters》 SCIE CAS CSCD 1992年第12期971-974,共4页 中国化学快报（英文版）

关键词 In KBR STUDIES ON THE SYNTHESIS OF THE SPIROKETAL FRAGMENT OF AZADIRACHTIN THF MHz ETOH OC

分类号 O6 [理学—化学]

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Chinese Chemical Letters

1992年第12期

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STUDIES ON THE SYNTHESIS OF THE SPIROKETAL FRAGMENT OF AZADIRACHTIN(Ⅰ)

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