Studies on the functionalisation of cis-bicyclo[3.3.0]oct-7-en-2-ol—approaches to the synthesis of specionin
作者:John Leonard、Nigel Hussain
DOI:10.1039/p19940000049
日期:——
During studies aimed at finding a synthetic route to specionin, methods have been developed for selective functionalisation of each ring of cis-bicyclo[3.3.0]oct-7-en-2-ol. Various exo-7,8-cisdihydroxy cis-bicyclo[3.3.0]octan-2-ol derivatives 9a–c were prepared and a ‘one-pot’ conversion into 9-hydroxy 2,4-diethoxy-3-oxa-cis-bicyclo[4.3.0]nonane derivatives 10a, b was developed. Acetonide, bis-ter
在旨在寻找合成血红素的合成途径的研究中,已经开发出用于选择性官能化顺式-双环[3.3.0] oct-7-en-2-ol每个环的方法。制备了多种exo -7,8-顺二羟基顺式-双环[3.3.0]辛-2-醇衍生物9a - c,并通过“一锅法”转化为9-羟基2,4-二乙氧基-3-氧-顺式开发了-双环[4.3.0]壬烷衍生物10a,b。制备了乙炔化物,双叔丁基二甲基甲硅烷基和二苄基保护的7,8-二醇衍生物13a – c,并将其转化为相应的7- exo,8-exo -dihydroxy- cis -bicyclo [3.3.0] octan-2-one衍生物12a – c。保护的7,8二羟基-顺式-双环[3.3.0]辛-3-烯-2-酮17A - Ç是在适中的产率制备选自酮12A - Ç。建立了维蒂希-烯反应顺序,将酮12a – c转化为烯醛22a – c和23a – c,然后再转化为醇28a – c和29a