“AN IMPROVED PROCESS FOR THE PREPARATION OF PURE HIGH QUALITY 3,3”,4,4’-TETRAMINOBIPHENYL“

Application 401/DELNP/2004 published 2006-03-10, filed 2004-02-20
Present application relates to a process for the preparation of pure high quality 3,33’, 4,4’-tetraminobiphenyl (TAB) in high yields.More particularly, it relates to a process for preparation of 3,3’, 4,4’ tetraminobiphenyl (TAB) involving a three step process (1) oxidation of 3,3’,-dichloro 4,4'-diaminobiphenyl (DCB) with 50% aq. H2O2, (2) ammonolysis of the resulting 3,3'-dinitro 4,4'-dinitrobiphenyl (DCDNB) and (3) the reduction of 3,3'-diamino-4,4'-dinitrobiphenyl (DADNB)with stannous chloride and concentrated hydrochloric acid.

Applicant

COUNCIL OF SCIENTIFIC & INDUSTRIAL RESEARCH
Rafi Marg, New Delhi-110 001, India

Inventor

1. ASIF MANER 2. BAVIKAR SUDHIR 3. ARUMUGAM SUDALAI 4. SWAMINATHAN SIVARAM

International Info

Classification: C08G 73/00
Publication Number: WO2005/063679
Application Date: 2003-12-29