New 1,3,5-heterocyclohexanes:: Dioxazines, oxadiazines, thiadiazines, oxathiazines and triazines and their amination, transamination and disproportionation reactions

被引:22
作者
Flores-Parra, A [1 ]
Sánchez-Ruíz, SA [1 ]
机构
[1] Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Chem, Mexico City 07000, DF, Mexico
关键词
D O I
10.3987/COM-99-8583
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
New 1,3,5-heterocyclohexanes: 5-alkyl-1,3,5-dioxazines (R= iPr, tBu and [R]-alpha-methylbenzyl), 3,5-di([R]-alpha-methylbenzyl)-1,3,5-oxadiazine, 3,5-di([R]-alpha-methylbenzyl)-1,3,5-thiadiazine. 5-isopropyl-1,3,5-oxathiazine, 1-isopropyl-3,5-dimethyl-1,3,5-triazine, 1-tert-butyl-3,5-dimethyl-1,3,5-triazine are reported. Amination and transamination reactions of 1,3,5-heterocyclohexanes were investigated. Equilibria between different heterocycles were found. C-13 NMR studies allowed to observe new 1,3,5-heterocycles: 1,3,5-triazines bearing two different alkyl substituents, 3,5-ditert-butyl-1,3,5-thiadiazine, 3-tert-butyl-5-isopropyl-1,3,5-oxadiazine. 1,3,5-heterocyclohexanes present a ring fluxional behavior, the ring inversion energy was calculated for dioxazines, oxadiazine, thiadiazines and triazines.
引用
收藏
页码:2079 / 2092
页数:14
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