3′-disubstituted, and 3,5-disubstitted perhydro-7a-methyloxazolo[3,4-c]oxazoles has been synthesised. Some indication of the predominant conformations of these systems and of the related perhydro-imidazo[1,5-c]thiazoles is obtainable from the magnitude of the geminal coupling constants of the methylene group protons situated between the heteroatoms.
已经合成了一系列的3-单取代的,3,3'-二取代的和3,5-二取代的全氢-7a-甲基
恶唑并[3,4- c ]
恶唑。这些体系和相关的全氢
咪唑并[1,5- c ]
噻唑的主要构型的某些迹象可从位于杂原子之间的亚甲基质子的双键偶合常数的大小获得。