Synthesis of the C1−C28 Portion of Spongistatin 1 (Altohyrtin A)
作者:Michelle M. Claffey、Christopher J. Hayes、Clayton H. Heathcock
DOI:10.1021/jo9910987
日期:1999.10.1
A synthetic approach was developed to the C1-C28 subunit of spongistatin 1 (altohyrtin A, 65). The key step was the coupling of the AB and CDspiroketal moieties via an anti-aldol reaction of aldehyde 62 and ethyl ketone 57. The development of a method for the construction of the AB spiroketal fragment is described and included the desymmetrization of C(2)-symmetric diketone 10 and the differentiation