9-(2-indol-3-ylethyl)-1-oxa-4,9-diazaspiro<5.5>undecan-3-one hydrochloride 、
ammonium hydroxide 在
二氯甲烷 作用下,
以
水 为溶剂,
以to afford 3 g of 9-[2-(3-indolyl)ethyl]-1-oxa-4,9-diazaspiro[5.5]undecan-3-one as the free base, mp 48°-50° C.的产率得到9-[2-(3-indolyl)ethyl-]-1-oxa-4,9-diazaspiro[5.5] undecan-3-one