专利号:WO-2013049605-A1 优先权日:2011-09-28 标题 :Processes for the preparation of an intermediate in the synthesis of eltrombopag 发明人:AVDAGIC AMIR; BARAN PHIL S 权利人:ASSIA CHEM IND LTD; TEVA PHARMACEUTICAL USA INC 摘要:3'-Amino-2'-hydroxybiphenyl-3-carboxylic acid (BPCA) and related compounds have been prepared using compounds such as: wherein R 1 is -H, -Cl or -F; R 2 is -Br or -I; and R 3 is -H or -N0 2 . BPCA is useful, for example, in the preparation of Eltrombopag.
专利号:WO-2021001044-A1 优先权日:2019-07-04 标题 :Process for the preparation of key intermediates for the synthesis of eltrombopag or salt thereof