Sterically hindered inversion of nitrogen atoms in cyclic hydrazines:N,N′-dialkyl-1,3,4-oxadiazolidines; 1,3,4-thiadiazolidine; and 4,5-benzo-1,2,3,6-tetrahydropyridazine
作者:R. G. Kostyanovsky、P. Rademacher、Yu. I. El'natanov、G. K. Kadorkina、G. A. Nikiforov、I. I. Chervin、S. V. Usachev、V. R. Kostyanovsky
DOI:10.1007/bf02495930
日期:1997.7
N,N′-Diisopropyl-substituted 1,3,4-oxadiazolidine3c, 1,3,4-thiadiazolidine6, 4,5-benzo-1,2,3,6-tetrahydropyridazine8, and new 3,4-dialkyl-1,3,4-oxadiazolidines9–14 were synthesized and studied. The configurational stability of the N atoms does not change on going from compound3c to itsS-analog6 and decreases in the case of pyridazine8. 3,4-Di-tert-alkyl-1,3,4-oxadiazolidines3d and11–14 were found to
N,N'-二异丙基取代的 1,3,4-恶二唑烷 3c、1,3,4-噻二唑烷 6、4,5-苯并-1,2,3,6-四氢哒嗪 8 和新的 3,4-二烷基-1,合成并研究了 3,4-恶二唑烷 9-14。N 原子的构型稳定性在从化合物 3c 到其 S-类似物 6 的过程中不会改变,并且在哒嗪 8 的情况下会降低。发现 3,4-二叔烷基-1,3,4-恶二唑烷 3d 和 11-14 是光学分辨率的有前途的目标。