The conversion of 2,5-anhydro-d-allononitrile derivatives by a nitrile hydratase from Rhodococcus rhodochrous IFO 15564 was studied. The activity of the enzyme was strongly effected by the steric bulkiness of the substituents at the 3-position of the substrates, and the corresponding amides were obtained in high yields from the nitriles with free hydroxyl groups at the 3- and 4-positions.
Stereoselective bromination of β-ribofuranosyl amide. Enantioselective synthesis of (+)-hydantocidin
作者:Philip M. Harrington、Michael E. Jung
DOI:10.1016/s0040-4039(00)77049-3
日期:1994.7
The synthesis of hydantocidin, a potent herbicidal natural product, is highlighted by a stereoselective bromination of β-D-ribofuranosyl amide to give only the α-bromo β-amide and subsequent spirocyclization about the anomeric position with silvercyanate to form the hydantoin moiety.
Process and intermediates for the preparation of (+)- hydantocidin and analogs thereof
申请人:AMERICAN CYANAMID COMPANY
公开号:EP0649847A2
公开(公告)日:1995-04-26
Hydantocidin is a potent non-selective herbicidal natural product. This invention provides an efficient method for the enantioselective preparation of (+)-hydantocidin, analogs thereof and intermediates therefor.