(2S,4R)-2-benzyloxymethyl-4-tritylsulfanyl-pyrrolidine 、
2,4-dioxo-1H-3,1-benzoxazine-6-sulfonyl chloride 以800220] gave (2S,4R)-6-(2-benzyloxymethyl-4-tritylsulfanyl-pyrrolidine-1-sulfonyl)-1H-benzo[d][1,3]oxazine-2,4-dione, MS的产率得到(2S,4R)-6-(2-benzyloxymethyl-4-tritylsulfanyl-pyrrolidine-1-sulfonyl)-1H-benzo[d][1,3]oxazine-2,4-dione