Se. Denmark et Ct. Chen, ALKYLATION OF CHIRAL, PHOSPHORUS-STABILIZED CARBANIONS - SUBSTITUENT EFFECTS ON THE ALKYLATION SELECTIVITY, Journal of organic chemistry, 59(11), 1994, pp. 2922-2924
The alkylation of a series of enantiomerically pure cis and trans 3-su
bstituted 2-benzyl-6-methyl-1,3,2-oxazaphosphorinane 2-oxides was foun
d to be sensitive to the bulk of the N-substituents.