C. Agami et al., TOTAL SYNTHESIS OF (-)-DESOXOPROSOPININE VIA THE DIASTEREOSELECTIVE REDUCTION OF HOMOCHIRAL2-ACYL-N-BOC-OXAZOLIDINES, Tetrahedron letters, 39(21), 1998, pp. 3505-3508
(-)-Desoxoprosopinine was synthesised from (R)-phenylglycinol as the c
hiral source. The three distinct steps used for the construction of th
e three stereogenic centers of the target were all highly diastereosel
ective. These steps include a reduction of a homochiral N-Boc-2-acyl o
xazolidine and the stereoselectivity of this reaction can be explained
by a non chelated model. An original N-debenzylation of the phenyl gl
ycinol appendage was devised in this synthesis. (C) 1998 Published by
Elsevier Science Ltd. All rights reserved.