2-(4-bromobenzylidene)-5-oxopyrazolidin-2-ium-1-ide 、
tert-butyl 3-(2-ethoxy-2-oxoethylidene)-2-oxoindole-1-carboxylate 在
13-Hydroxy-10-(13-hydroxy-13-oxo-12,14-dioxa-13lambda5-phosphapentacyclo[13.8.0.02,11.04,9.016,21]tricosa-1(15),2,4,6,8,10,16,18,20,22-decaen-10-yl)-12,14-dioxa-13lambda5-phosphapentacyclo[13.8.0.02,11.04,9.016,21]tricosa-1(15),2,4,6,8,10,16,18,20,22-decaene 13-oxide 作用下,
以
二氯甲烷 为溶剂,
反应 4.0h,
以94%的产率得到(1'S,2'R,3'R)-1-tert-butyl 3'-ethyl 1'-(4-bromophenyl)-2,5'-dioxo-3',5',6',7'-tetrahydro-1'H-spiro[indoline-3,2'-pyrazolo[1,2-a]pyrazole]-1,3'-dicarboxylate