3,5-Dialkyltetrahydro-4H-thiopyran-4-ones under the conditions of Mannich reaction
作者:Larisa A. Baeva、Lyaysan F. Biktasheva、Akhnef A. Fatykhov、Nafisa K. Lyapina
DOI:10.1007/s10593-016-1806-x
日期:2015.11
while aminomethylation with a mixture of formaldehyde and methylamine, hexylamine, monoethanolamine, or hydrochlorides of methyl, ethyl, and 2-propyl esters of aminoacetic acid at рH 7–8 produced the respective 1,5-dimethyl-3-thia-7-azabicyclo[3.3.1]nonanes. An equilibrium between the chair and boat conformations in the thiopyranone ring was found in CDCl3 solutions of 7-(2-hydroxyethyl)-1,5-dimethyl-3
戊烷-3-酮,5-甲基己酮-3-酮和庚烷-4-酮与甲醛和硫化钠的混合物进行硫甲基化,分别得到3,5-二烷基四氢-4 H-噻喃-4-酮,而3在伯胺的存在下形成了1,5-二羟甲基-或3,5-二烷基-5-羟甲基四氢-4 H硫代吡喃-4-醇。3,5-二甲基四氢-4 H-的氧化在四氢呋喃和氯仿中将噻喃-4-酮与等量的过氧化氢分别导致亚砜和砜,而甲醛和甲胺,己胺,单乙醇胺或甲基,乙基和2-丙基盐酸盐的混合物进行氨甲基化氨基乙酸的酯在рH7–8处生成相应的1,5-二甲基-3-硫杂-7-氮杂双环[3.3.1]壬烷。在7-(2-羟乙基)-1,5-二甲基-3-硫杂-7-氮杂双环[3.3.1]壬南-9-一的CDCl 3溶液中发现了噻喃酮环中椅子构型与船形之间的平衡。在50°С和20°C下的1,5,7-三甲基-3-硫杂-7-氮杂双环[3.3.1]壬南-9-一高氯酸盐的DMSO- d 6溶液中。