The present disclosure relates to a process for the preparation of endo-hexahydro-8-(3-indolylcarbonyloxy)-2,6-methano-2H-quinolizin-3(4H)-one or Dolasetron base. It also discloses a process for the preparation of endo-hexahydro-8-(3-indolylcarbonyloxy)-2,6-methano-2H-quinolizin-3(4H)-one mesylate or Dolasetron mesylate. Further, the present disclosure relates to a process for producing Form I of Dolasetron base, and to the novel crystalline polymorphs, Form II, III, IV and V of Dolasetron base and industrial processes for producing them.
本公开涉及一种制备内酯型六氢-8-(3-
吲哚基羰氧基)-2,6-甲基-2H-
喹唑啉-3(4H)-酮或多拉司琼(Dolasetron)碱的方法。它还公开了一种制备内酯型六氢-8-(3-
吲哚基羰氧基)-2,6-甲基-2H-
喹唑啉-3(4H)-酮
甲磺酸盐或多拉司琼
甲磺酸盐的方法。此外,本公开还涉及制备多拉司琼碱的I型晶体,以及多拉司琼碱的新晶体多态形式II、III、IV和V的工业生产过程。