Abstract
The chiral reagents (+)- and (−)-Ipc) 2BOTf, in the presence of Et 3N, are used to control the aldol condensation reactions of chiral ethylketone 5 with prochiral aldehydes. The SS isomer, 6 or 8, or SA isomer, 7 or 9, is then formed in > 99% ee and with up to 93% diastereoselectivity.
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