diethyl ((E)-1,3-butadienyl)phosphonate 、 tert-butyl 1,8-dimethyl-15-oxa-16-azatetracyclo[6.6.2.0.
2,70
9,14]hexadeca-2,4,6,9,11,13-hexaene-16-carboxylate 以
1,2-二氯乙烷 为溶剂,
反应 15.0h,
以1.85 g的产率得到diethyl 3,6-dihydro-2-(tert-butoxycarbonyl)-1,2-oxazin-6-yl-6-phosphonate