9-{2-[(S)-1-(4-chloro-phenyl)-ethylamino]-ethyl}-3,3-dimethyl-1,5-dioxa-spiro[5.5]undecan-9-ol 、
三光气 、 在
3-[(S)-1-(4-chloro-phenyl)-ethyl]-1-oxa-3-aza-spiro[5.5]undecane-2,9-dione 作用下,
以besides the title compound the intermediate 3-[(S)-1-(4-chloro-phenyl)-ethyl]-12,12-dimethyl-1,10,14-trioxa-3-aza-dispiro[5.2.5.2]hexadecan-2-one (35% of theory) is also isolated的产率得到3-[(S)-1-(4-chloro-phenyl)-ethyl]-1-oxa-3-aza-spiro[5.5]undecane-2,9-dione