Stereospecific synthesis of a new class of compounds: bis-homoconduritol-A, -D, and -F
作者:Latif Kelebekli、Yunus Kara、Metin Balci
DOI:10.1016/j.carres.2005.05.021
日期:2005.9
derivatives with conduritol-A, -D, and -F structures have been synthesized starting from cyclooctatetraene. The photooxygenation of trans-7,8-dibromo- and cis-7,8-dichlorobicyclo[4.2.0]octa-2,4-dienes afforded the bicyclic endoperoxides. Reduction of the endoperoxides with thiourea followed by acetylation gave the corresponding diacetates. The KMnO(4) oxidation and epoxidation of the diacetates followed
Synthesis of novel tetrols from syn-bisepoxide: Preparation of halogenated bicyclo[4.2.0] inositols
作者:Abdullah Karanfil、Ertan Şahin、Latif Kelebekli
DOI:10.1016/j.tet.2020.131000
日期:2020.3
The synthesis of halogenated bicyclo[4.2.0] inositols (and/or tetrols) are described. The photooxygenation of trans-7,8-dibromobicyclo[4.2.0]octa-2,4-diene obtained using cyclooctatetraene as the starting molecule afforded the bicyclic endoperoxide. To obtain the halogenated bicyclo[4.2.0] inositols, the required key intermediate endoperoxide was rearranged quantitatively to the corresponding bisepoxide
描述了卤代双环[4.2.0]肌醇(和/或四醇)的合成。以环辛酸酯为起始分子而获得的反式-7,8-二溴双环[4.2.0]辛-2,4-二烯的光氧化作用提供了双环过氧化物。为了获得卤代双环[4.2.0]肌醇,在热条件下将所需的关键中间体内过氧化物定量地重排为相应的双环氧化物。双环氧化物与H + / Ac 2 O的开环反应导致四乙酸酯的混合物以及环状硫酸盐的形成。最终,通过NH 3对乙酸根的氨解反应,高收率获得了所需的卤代双环[4.2.0]肌醇(和/或四元醇)。。所有合成化合物的结构均通过光谱法表征。
Synthesis of new conduritol analogues derived from bicyclooctatriene: Bis-homo-conduritol-D and bis-homoconduritol-F
作者:Yunus Kara、Metin Balcı、Susan A. Bourne、William H. Watson
DOI:10.1016/s0040-4039(00)76904-8
日期:1994.5
The first synthesis of conduritol analogues 2 and 3 is reported. The key compound 7 reacted with KMnO4 and m-chloroperbenzoic acid in a stereospecific manner to give syn-addition products 9 and 10, respectively. Zinc-dust elimination of 10 followed by epoxide opening resulted in the formation of 3b. The free tetrol 3 was obtained by ammonolysis. The other tetrol isomer 2 was obtained by similar synthetic steps.
allo-inositol (or bicyclo[4.2.0]octane motif) structures were synthesized. Photooxygenation of trans-7,8-dibromo-bicyclo[4.2.0]octa-2,4-diene allowed the preparation of tricyclic endoperoxide. The compound diacetate was obtained by reduction of endoperoxide with thiourea followed by acetylation reaction. Removal of halides with zinc dust in acetic acid yielded the dien-diacetate, a key compound of the designed