Enantioselective Addition of Bromonitromethane to Aliphatic <i>N</i>-Boc Aldimines Using a Homogeneous Bifunctional Chiral Organocatalyst
作者:Kenneth E. Schwieter、Jeffrey N. Johnston
DOI:10.1021/acscatal.5b01901
日期:2015.11.6
This report details the enantioselectivesynthesis of β-amino-α-bromo nitroalkanes with β-alkyl substituents, using homogeneous catalysis to prepare either antipode. Use of a bifunctionalBrønstedbase/acid catalyst allows equal access to either enantiomer of the products, enabling the use of Umpolung Amide Synthesis (UmAS) to prepare the corresponding L- or D-α-amino amide bearing alkyl side chains—overall
Enantioselective synthesis of <scp>d</scp>-α-amino amides from aliphatic aldehydes
作者:Kenneth E. Schwieter、Jeffrey N. Johnston
DOI:10.1039/c5sc00064e
日期:——
Bromonitromethane is used in a phase transfer-catalysed enantioselective aza-Henry reaction, leading to D-amino amide bearing an alkyl chain.
溴硝基甲烷用于相转移催化的对映选择性氮杂-亨利反应,生成带有烷基链的 D-氨基酰胺。
An expeditious one-pot synthesis of diethyl N-Boc-1-aminoalkylphosphonates
作者:Anna Klepacz、Andrzej Zwierzak
DOI:10.1016/s0040-4039(01)02289-4
日期:2002.2
A general one-pot, purification-free synthesis of diethyl N-Boc-1-aminoalkylphosphonates has been developed. The procedure involves base-catalyzed Michael-type addition of sodium diethyl phosphite to N-Boc imines generated in situ by the action of sodium hydride on α-amidoalkyl-p-tolyl sulfones in tetrahydrofuran.
Phase Transfer Catalyzed Enantioselective Strecker Reactions of α-Amido Sulfones with Cyanohydrins
作者:Raquel P. Herrera、Valentina Sgarzani、Luca Bernardi、Francesco Fini、Daniel Pettersen、Alfredo Ricci
DOI:10.1021/jo061566u
日期:2006.12.1
A study into the use of a chiral phase-transfer catalyst in conjunction with acetone cyanohydrin to effect the enantioselective formation of α-amino nitriles from α-amido sulfones is described. This novel catalytic asymmetric Streckerreaction is analyzed with regard to the possible mechanistic basis.
A facile reaction of imines with telluronium allylide. Highly stereoselective synthesis of vinylaziridinesElectronic supplementary information (ESI) available: experimental section. See http://www.rsc.org/suppdata/cc/b4/b400464g/
作者:Wei-Wei Liao、Xian-Ming Deng、Yong Tang
DOI:10.1039/b400464g
日期:——
The reaction of telluronium allylides with alkylimines, generated in situ from alpha-amidoalkyl sulfones, affords cis-alkylvinylarizidines with good stereoselectivity in good yields. However, the same ylides react with N-aryl imines to provide trans-vinylaziridines.