Catalytic Enantio- and Diastereoselective Alkylations with Cyclic Sulfamidates
作者:Thomas A. Moss、Beatriz Alonso、David R. Fenwick、Darren J. Dixon
DOI:10.1002/anie.200905329
日期:2010.1.12
Open for business: The enantio‐ and diastereoselective nucleophilic ring opening of five‐membered and six‐membered cyclicsulfamidates under asymmetric phase‐transfer catalysis is presented. A range of pro‐nucleophiles have been successfully alkylated in good yields and in good to excellent enantioselectivites.
Catalytic Asymmetric Alkylation Reactions for the Construction of Protected Ethylene-Amino and Propylene-Amino Motifs Attached to Quaternary Stereocentres
作者:Thomas A. Moss、David M. Barber、Andrew F. Kyle、Darren J. Dixon
DOI:10.1002/chem.201203825
日期:2013.2.25
An efficient catalytic and stereoselective method for the direct construction of protected ethylene‐amino and propylene‐amino scaffolds attached to quaternary stereocentres is reported. Preliminary investigations revealed a mild base catalysed nucleophilic ring opening of N‐sulfonyl aziridines using the commercially available phosphazene base 2‐tert‐butylimino‐2‐diethylamino‐1,3‐dimethyl‐perhydro‐1