Abraham N. Kurtz

cis-3-Chloroacrylic Acid: A New Cotton Defoliant and Crop Desiccant

cis-3-Chloroacrylic acid is a potent cotton defoliant and a crop desiccant. Relationships between structure and activity indicate a relatively high degree of specificity, since minor modifications in structure result in loss of activity.

Halogen migration in the reaction of dichloroalkanes with aluminum chloride

Abstract The same equilibrium mixture of dichloropropanes is obtained when either 1,1-, 1,2-, or 1,3-dichloropropane is treated with aluminum chloride. 1,2- and 1,3-Dichlorobutane undergo very rapid interconversion under comparable conditions. No trace of any other isomer is detectable. The 2,3-dichlorobutanes undergo diastereomeric equilibration accompanied by about 3% 2,2-dichlorobutane. 1,4-Dichlorobutane can be partially isomerized to a mixture of 1,2- and 1,3-dichlorobutane. Analogous results are obtained with the dichloropentanes. Thus, both 2,3- and 2,4-dichloropentane diastereomers undergo rapid equilibration. 1,2-Dichloropentane forms predominantly 1,3- and 1,4-dichloropentane.