A method is provided for preparing a chiral benzaldehyde of the structure ##STR1## by acylating an anhydride of the structure ##STR2## with a chiral oxazolidine of the structure ##STR3## where Q is MgHal or Li, and X, Y and Z are as described herein, to form a keto acid which is reduced and cyclized. The resulting benzaldehyde may be used in making the final anti-thrombotic - anti-vasospastic compounds. Novel intermediates are also provided.
提供了一种制备手性
苯甲醛的方法,该方法通过用结构为##STR2##的酐与结构为##STR3##的手性
噁唑啉
酮酸酯进行酰化反应,其中Q为MgHal或Li,X、Y和Z如本文所述,形成
酮酸,然后还原和环化。生成的
苯甲醛可用于制备最终的抗血栓-抗血管痉挛化合物。同时提供了新颖的中间体。