[(S)-1-[(1S,2S,5S)-2-Hydroxy-2,6,6-trimethyl-bicyclo[3.1.1]hept-(3E)-ylideneamino]-3-(tetrahydro-pyran-2-yloxy)-propyl]-phosphonic acid diethyl ester 在
柠檬酸 作用下,
以
四氢呋喃 为溶剂,
反应 96.0h,
以73%的产率得到diethyl ((1S,2S,4'S,5S)-2-hydroxy-2,6,6-trimethylspiro[bicyclo[3.1.1]heptane-3,2'-[1,3]oxazinan]-4'-yl)phosphonate