Regioselective Reductive Ring Cleavage of 3-Benzyltetrahydro-1,3-oxazines to 3-Dialkylaminopropanols and of 3-Benzyl-3-methyltetrahydro-1,3-oxazinium Iodides to Alkyl 3-Dialkylaminopropyl Ethers
作者:Angel Alberola、M Angeles Alvarez、Celia Andrés、Alfonso González、Rafael Pedrosa
DOI:10.1055/s-1990-26819
日期:——
3-Benzyltetrahydro-1,3-oxazines and their methiodides are ring-cleaved upon reduction with lithium aluminum hydride to give 3-dialkylaminopropanols or alkyl 3-dialkylaminopropyl ethers, respectively, in good yields. The reducing agent regioselectively cleaves the C-O bond in tetrahydro-1,3-oxazines and the C-N bond in the tetrahydro-1,3-oxazinium salts.
用氢化铝锂还原 3-苄基四氢-1,3-噁嗪和它们的甲碘化物时,会发生环裂解,分别得到 3-二烷基氨基丙醇或 3-二烷基氨基丙基烷基醚,产率很高。还原剂可选择性地裂解四氢-1,3-噁嗪中的 C-O 键和四氢-1,3-噁嗪盐中的 C-N 键。