作者:Jeffery W. Frazier、Mike A. Staszak、Leland.O. Weigel
DOI:10.1016/s0040-4039(00)91559-4
日期:1992.2
(7) has been converted to (1). Oxidation of sodium erythorbate to (8) followed by selective monotosylation and treatment with sodium ethoxide provided (10). Swern oxidation of this epoxide into the aldehyde (11), formation with tert-butylglycinate and an reaction with phthalimidoacetyl chloride afforded the (3S,4S)-cis- (13). Appropriate functional group manipulations followed by a condensation, chlorination
(7)已转换为(1)。将异抗坏血酸钠氧化成(8),然后进行选择性单磺酰化并用乙醇钠处理(10)。此环氧化物的Swern氧化成醛(11),形成与叔-butylglycinate和用苯二甲酰氯反应,得到(3小号,4小号) -顺式- (13)。适当的功能组操作,然后进行缩合,氯化和保护基团的去除产生了对映异构纯的劳拉卡帕夫核(24)。