5,6-Trimethylene-3,4,5,6-tetrahydro-1,3-oxazin-2-ones ane 2 thiones (11–20) were synthesized from cis and trans-2-aminomethylcyclopentanols (6–10) by reaction with urea ethyl chloroformate, carbon disulphide or thiophosgene. The cyclization reactions were also successful with the trans-amino-alcohols, at variance with earlier literature data relating to 1,2-disubstituted 1,3-bifunctional trans-cyclopentane
顺式-和反式-5,6-三亚
甲基-3,4,5,6-四
氢-1,3-恶嗪-2-
酮ANE 2个
硫酮(11 - 20)从合成顺式和反式-2- aminomethylcyclopentanols(6 - 10)通过与
尿素氯甲酸乙酯,
二硫化碳或
硫光气反应。反式-
氨基醇的环化反应也成功,与早期文献数据有关,涉及1,2-二取代的
1,3-双官能反式-
环戊烷衍
生物的X-射线衍射分析反式-5,6-三亚
甲基- 3,4,5 6-四
氢-1,3恶嗪-2-
硫酮(17)表明,环外CXXXS sp 2键参与在S(10)O(1),N(3)和C(2)原子上形成的共平面离域pπ-pπ键系统,因此C( 2)-N(3)[1.304(7)å]和C(2)-O(1)[1.337(7)å]键具有某些多重键特征。与相关杂环相比,C(2)和N(3)处的环内键角显着打开。在六元杂环的键中,C(5)-C(6)显着缩短[1.448(9)å]反式
环戊烷衍生