Patent ID: 8975421
Filing Date: 2015-03-10
Classification: C07D,Y02P

Abstract:
1. A process for preparation of compound of formula I comprising of selectively hydrogenating the compound of formula II followed by subsequent cyclisation in presence of a non-noble metal bi-functional catalyst wherein said catalyst comprises copper and a metal oxide wherein the atomic ratio of copper to the metal of the metal oxide is selected from the group consisting of Cu:Zr in a ratio of about 1:1; Cu:Cr, in a ratio of about 1:1; Cu:Ba in a ratio of about 1:1, Cu: Al in a ratio of about 1;1, Cu:Cr:Al in a ratio of about 4:4:2, Cu:Ba:Al in a ratio of about 4:4:2 in a solvent at a temperature in the range of 453 to 653 K at pressure in the range of 435 to 580 psi, having selectivity of compound of formula I in the range of 40 to 100% and conversion of compound of formula II to compound of formula I in the range of 9 to 100%.