tert-butyl 2'-chloro-11'-fluoro-12',12a'-dihydrospiro[azetidine-3,6'-pyrido[2',3':5,6][1,3]oxazino[3,4-a]indole]-1-carboxylate 在
manganese(IV) oxide 作用下,
以
1,2-二氯乙烷 为溶剂,
以80%的产率得到Tert-butyl 4-chloro-15-fluorospiro[8-oxa-3,10-diazatetracyclo[8.7.0.02,7.011,16]heptadeca-1(17),2(7),3,5,11(16),12,14-heptaene-9,3'-azetidine]-1'-carboxylate