(2R,3S)-(-)-N-Boc-2,3-二苯基-6-氧代吗啉 、
3-cyclobutylbenzyl bromide 、
sodium hexamethyldisilazane 、 在
water ethanol 作用下,
以
四氢呋喃 为溶剂,
以to afford 1.90 g (54%) of tert-butyl (2R, 3S, 5S)-6-oxo-2,3-diphenyl-5-(3-cyclobutylbenzyl)-4-morpholinecarboxylate as a white powder, m.p. 145-147° C.的产率得到tert-Butyl (2 R , 3 S , 5 S)-6-oxo-2,3-diphenyl-5-(3-cyclobutylbenzyl)-4-morpholinecarboxylate