Use of compounds to enhance synchrony of germination and emergence in
申请人:National Research Council of Canada
公开号:US05518995A1
公开(公告)日:1996-05-21
The present invention relates to a composition for enhancing synchrony of germination and emergence in plants and comprises an effective amount of a compound having the following general formula (I); ##STR1##
Experimental and Computational Studies of Nucleophilic Additions of Metal Hydrides and Organometallics to Hindered Cyclohexanones
作者:Kaori Ando、K. N. Houk、Joachim Busch、Alexander Menassé、Urs Séquin
DOI:10.1021/jo9616116
日期:1998.3.1
The stereochemistries of nucleophilic additions of several hydride, methyl, and acetylenic Grignard and lithium reagents to hindered cyclohexanones were investigated experimentally. Acetylenic reagents attack hindered cyclohexanones from the axial direction, in contrast to the result with other reagents. Ab initio calculations and a modified MM2 transition-state force field were used to study the origins of stereoselectivity.
LAMB, NANCY;ABRAMS, SUZANNE R., CAN. J. CHEM., 68,(1990) N, C. 1151-1162