4-fluorobenzaldehyde, 3-and 4-pyridinecarboxaldehyde and 1-methyl-2-imidazolecarboxaldehyde) using piperidine as a catalyst. In addition, (E)-7-benzylidenenaloxone was prepared by the previously published Claisen-Schmidt condensation using sodium hydroxide in methanol. The stereochemistry of these arylidene derivatives 3–9 was determined to be (E) by means of nuclear Overhauser enhancement experiments. The
若干(ë)-7- arylidenenaltrexones通过的
水的共沸蒸馏从
纳曲酮的苯溶液和芳族醛(
苯甲醛,4-
氯和4-
氟代
苯甲醛,3-和
4-吡啶甲醛和1-甲基合成2-
咪唑甲
甲醛),以
哌啶为催化剂。另外,(E)-7-亚苄基
纳洛酮是通过先前公开的使用
甲醇中的
氢氧化钠的Claisen-Schmidt缩合制备的。通过核Overhauser增强实验确定了这些亚芳基衍
生物3–9的立体
化学为(E)。的13(的C NMR谱ë) - 3-9 以
氘代氯仿记录盐酸盐,以
氘代
二甲基亚砜记录盐酸盐。