The interaction between dialkyl alkynylphosphonites and pyruvic acid methyl ester in boiling benzene afforded 1,1-dialkoxy-3,6-dimethyl-3,6-di(methoxycarbonyl)-4R-2,7-dioxa-1-phosphabicyclo [3.2.0] hept-4-enes.
在沸腾的苯中,二烷基炔基
亚膦酸酯和
丙酮酸甲酯之间的相互作用提供了1,1-二烷氧基-
3,6-二甲基-3,6-二(甲氧基羰基)-4R-2,7-二氧杂-1-
磷酸双环[3.2.0 ]庚4烯。