Enantioselective synthesis of antibiotic (+)-rancinamycin III derivative and two protected carbasugars of the α-d-talo-series from furan
作者:Odón Arjona、Fátima Iradier、Rocı́o Medel、Joaquı́n Plumet
DOI:10.1016/s0957-4166(99)00358-4
日期:1999.8
carbasugar related to rancinamycin III, has been achieved from diene (+)-3 in two steps using as the key step the transformation of alkyne (−)-2, obtained by resolution of alcohol 6, into diene (+)-3 by treatment with Na/MeOH. Moreover, reduction of the carbonyl group in (+)-1 affords diol (+)-19, in which different protection strategies of the hydroxy groups allows one to obtain, selectively, protected
(+)- 1(与兰辛霉素III相关的羧甲基)的合成已通过二步法由二烯(+)- 3进行,其中关键步骤是通过拆分醇6获得炔烃(-)- 2的转化通过用Na / MeOH处理,生成二烯(+)- 3。此外,还原(+)- 1中的羰基可得到二醇(+)- 19,其中不同的羟基保护策略可让人们选择性地获得α-d-咔唑吡喃糖(+)- 4a的保护衍生物。选择性地得到其6-脱氧衍生物(+)- 4b。