Solid-Liquid Phase Transfer Catalytic Synthesis. VII The Synthesis of α-Substituted-2-pyridylmethyl-amineviathe Alkylation of Benzaldehyde Imine
摘要:
The anion derived from the benzaldehyde imine 2 reacts with alkyl halide to form alkylated products 3; Hydrolysis of 3 gives alpha-alkyl-2 pyridylmethylamine in 34-53% overall yield.
α-Aminoallylation of aldehydes in aqueous ammonia has been developed; commercial aqueous ammonia was successfully used, and this method does not require anhydrous conditions thus leading to easy and practical operations.
α-Aminoallylation of Aldehydes with Ammonia: Stereoselective Synthesis of Homoallylic Primary Amines
作者:Masaharu Sugiura、Keiichi Hirano、Shū Kobayashi
DOI:10.1021/ja049689o
日期:2004.6.1
Three-component reactions of aldehydes, ammonia, and allylboronates were found to provide homoallylic primary amines in high yields with high chemo- and stereoselectivities. A two-step, one-pot, stereoselectivesynthesis of an uncommon alpha-amino acid, alloisoleucine, was achieved utilizing this reaction.
METHODS OF PREPARING PRIMARY, SECONDARY AND TERTIARY CARBINAMINE COMPOUNDS IN THE PRESENCE OF AMMONIA
申请人:Thadani Avinash N.
公开号:US20100174090A1
公开(公告)日:2010-07-08
The present application relates to novel methods for the preparation of primary, secondary and tertiary carbinamine compounds, particularly the preparation of compounds of formulae I, IV and VI, from a carbonyl compound of formula II in the presence of ammonia or an ammonium equivalent of the formula NH
4
+
X
−
, by way of allylation, crotylation, arylation, reductive amination and catalytic hydrogenation.
METHODS OF PREPARING SECONDARY CARBINAMINE COMPOUNDS WITH BORONIC ACIDS
申请人:Thadani Avinash N.
公开号:US20100298572A1
公开(公告)日:2010-11-25
The present application relates to novel methods for the preparation of secondary carbinamine compounds, particularly the preparation of secondary carbinamine compounds of the formula Ia, formula Ib or formula IV from aldehydes of the formula II and boronic acids of the formula III or formula V, in the presence of ammonia or an ammonia equivalent of the formula NH
4+X−
.