The present invention provides process for preparation of molindone (I) comprising: a) reacting compound with cyclohexane-1,3-dione to form 2-(2-oxopentan-3-yl)cyclohexane-1,3-dione wherein X is Cl, Br or I, b) cyclizing 2-(2-oxopentan-3-yl)cyclohexane-1,3-dione to 2-methyl-3-ethyl-4-oxo-4,5,6,7-tetrahydroindole, c) reacting 2-methyl-3-ethyl-4-oxo-4,5,6,7-tetrahydroindole with morpholine and formaldehyde to give molindone (I), and d) optionally converting molindone (I) to its salt. The present invention further provides process for preparation of compound comprising: a) reacting compound with ethyl halide and another halide source to form compound wherein R is alkyl and X is Cl, Br or I; b) converting compound to compound.
本发明提供了制备
吗茚酮(I)的工艺,包括a) 将化合物与
环己烷-1,3-二酮反应生成 2-(2-氧代
戊烷-3-基)
环己烷-1,3-二酮,其中 X 为 Cl、Br 或 I, b) 将 2-(2-氧代
戊烷-3-基)
环己烷-1,3-二酮环化为 2-甲基-3-乙基-4-氧代-4、5,6,7-四氢
吲哚,c) 2-甲基-3-乙基-4-氧代-
4,5,6,7-四氢吲哚与吗啉和
甲醛反应得到吗啉酮(I),d) 可选择地将吗啉酮(I)转化为其盐。本发明进一步提供了制备化合物的工艺,包括: a) 将化合物与卤化
乙烷和另一种卤化源反应生成化合物,其中 R 为烷基,X 为 Cl、Br 或 I; b) 将化合物转化为化合物。