[EN] STRECKER REAGENTS, THEIR DERIVATIVES, METHODS FOR FORMING THE SAME AND IMPROVED STRECKER REACTION<br/>[FR] RÉACTIFS DE STRECKER, LEURS DÉRIVÉS, PROCÉDÉS POUR LES FORMER ET RÉACTION DE STRECKER AMÉLIORÉE
申请人:NOWA PHARMACEUTICALS CO LTD
公开号:WO2011116530A1
公开(公告)日:2011-09-29
Strecker reagents, their derivatives and methods for forming the same and improved Strecker reaction are provided. The electrophiles for asymmetric Strecker reaction include achiral N-phosphorazides, N-phosphoramides, N-phosphonyl imines and their derivatives. The nucleophiles for asymmetric Strecker reaction include chiral BINOL-derived azides, amides, imines and their derivatives, the chiral and achiral diol-based cyanides and their derivatives, the chiral and achiral diamine-based cyanides and their derivatives, the chiral and achiral amino alcohol-based cyanides and their derivatives, the Strecker nucleophiles that are derived from chiral and achiral hydroxyl carboxylic acids and amino acids. Methods of forming the electrophile for asymmetric Strecker reaction comprise the reactions with steps of: a) synthesizing phosphoryl chloride from achiral diamine; b) synthesizing phosphorous azide; c) synthesizing phosphoramide; d) synthesizing the corresponding achiral N-phosphonyl imines. The asymmetric catalytic Strecker reaction of new achiral N-phosphonyl imines has been developed to give excellent enantioselectivity (up to >99%ee) and yields (up to >97%).
A double axially chiral bisphosphorylimide has been demonstrated to be an efficient and highly sterically hindered Bronsted acid in asymmetric three-component Mannich reactions. Optically active syn-beta-amino ketones were obtained in high yields (up to 99%) with excellent diastereoselectivity (99:1) and enantioselectivity (up to 99% ee). A gram-scale reaction was also performed to prove the synthetic application value of this reaction. (c) 2012 Elsevier Ltd. All rights reserved.
Phosphoryl Azides as Versatile New Reaction Partners in the Cu-Catalyzed Three-Component Couplings
作者:Seok Hwan Kim、Doo Young Jung、Sukbok Chang
DOI:10.1021/jo7016247
日期:2007.12.1
[GRAPHICS]Phosphoryl azide was successfully employed as an efficient reacting partner in the Cu-catalyzed three-component reaction with 1-alkynes and amines to produce the corresponding phosphoryl amidines in high yields. A range of fruitful applicability of the produced amidines was also demonstrated such as an alkoxide exchange and asymmetric alpha-alkylation of optically active BINOL-derived amidines.
Chiral N-phosphoryl imines: design, synthesis and direct asymmetric addition reactions with diketones and diesters
作者:Hao Sun、Trideep Rajale、Yi Pan、Guigen Li
DOI:10.1016/j.tetlet.2010.06.072
日期:2010.8
Chiral N-phosphoryl imines derived from (S)-BINOL have been designed and synthesized in good to excellent chemical yields. These N-phosphoryl imines were found to react with diketones smoothly without the use of any bases. They can also serve as electrophiles for the reaction with diethyl malonate in the presence of potassium carbonate. Good yields (62%—quant) and excellent diastereoselectivities (up
STRECKER REAGENTS, THEIR DERIVATIVES, METHODS FOR FORMING THE SAME AND IMPROVED STRECKER REACTION
申请人:Li Guigen
公开号:US20130137889A1
公开(公告)日:2013-05-30
Strecker reagents, their derivatives and methods for forming the same and improved Strecker reaction are provided. The electrophiles for asymmetric Strecker reaction include achiral N-phosphorazides, N-phosphoramides, N-phosphonyl imines and their derivatives. The nucleophiles for asymmetric Strecker reaction include chiral BINOL-derived azides, amides, imines and their derivatives, the chiral and achiral diol-based cyanides and their derivatives, the chiral and achiral diamine-based cyanides and their derivatives, the chiral and achiral amino alcohol-based cyanides and their derivatives, the Strecker nucleophiles that are derived from chiral and achiral hydroxyl carboxylic acids and amino acids. Methods of forming the electrophile for asymmetric Strecker reaction comprise the reactions with steps of: a) synthesizing phosphoryl chloride from achiral diamine; b) synthesizing phosphorous azide; c) synthesizing phosphoramide; d) synthesizing the corresponding achiral N-phosphonyl imines. The asymmetric catalytic Strecker reaction of new achiral N-phosphonyl imines has been developed to give excellent enantioselectivity (up to >99% ee) and yields (up to >97%).