Process for preparing Tadalafil and its intermediate

Details Process for preparing Tadalafil and its intermediate Process for preparing Tadalafil and its intermediate

2007-05-29

2007-05-29

Aulakh, Charanjit S. (Department: 1625)

Organic compounds -- part of the class 532-570 series

Organic compounds

Nitrogen attached directly or indirectly to the purine ring...

C546S085000

Reexamination Certificate

active

11492246

ABSTRACT:
The present invention relates an improved process for the preparation of tetrahydro-β-carboline derivative of formula (V) which is useful as an intermediate for the preparation of Tadalafil of formula (I). Moreover, the present invention relates to the process for the preparation of Tadalafil of formula (I)

REFERENCES:
Zhang, Y. et al.: Improved synthesis of Tadalafil. Organic prep. and proceed. Intern., vol. 37, pp. 99-102, 2005.

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