Diastereoselective preparation of novel tetrahydrooxazinones via heterocycloaddition of N-Boc, O-Me-acetals
作者:Patricia Gizecki、Ramzi Ait Youcef、Céline Poulard、Robert Dhal、Gilles Dujardin
DOI:10.1016/j.tetlet.2004.10.154
日期:2004.12
Under Lewis acid conditions, reaction of N-Boc, O-Me acetals with the (R)-(+)-O-vinyl-pantolactone does not lead to the expected dihydrooxazine, but to the corresponding tetrahydrooxazinone, as a result of the loss of the t-Bu group. A diastereoselective and asymmetrical way to these new heterocyclic compounds is described, together with the first evidence of their ability to undergo N-acylation.
在路易斯酸条件下,由于损失,N -Boc,O -Me乙缩醛与(R)-(+)- O-乙烯基-泛内酯的反应不会产生预期的二氢恶嗪,但会导致相应的四氢恶嗪酮所述的吨-Bu基。描述了对这些新的杂环化合物的非对映选择性和不对称方式,以及它们经历N酰化能力的第一个证据。