Dichlorotris(triphenylphosphine)ruthenium is highly active as a catalyst for the N-heterocyclisation of 2-aminophenethylalcohols (2a–d) into indole derivatives in toluene under reflux, and the reactions proceed with spontaneous hydrogen evolution.
[EN] CHEMICAL COMPOUNDS<br/>[FR] COMPOSÉS CHIMIQUES
申请人:ASTRAZENECA AB
公开号:WO2019002442A1
公开(公告)日:2019-01-03
The specification relates to compounds of Formula (I) and to pharmaceutically acceptable salts thereof, to processes and intermediates used for their preparation, to pharmaceutical compositions containing them and to their use in the treatment of cell proliferative disorders.
DEHYDROGENATIVE N-HETEROCYCLIZATION OF 2-(2-AmINOARYL)ETHYL ALCOHOLS TO INDOLE DERIVATIVES CATALYZED BY (μ-OXO)TETRARUTHENIUM CLUSTER/1,2-BIS(DIPHENYLPHOSPHINO)BENZENE
A novel catalyst system of (mu-oxo)tetraruthenium cluster (2) combined with 1,2-bis(diphenylphosphino)benzene (dppbz) realized a simple, selective, and practical synthesis of indole and its derivatives from 2-(2-aminoaryl)ethyl alcohols via dehydrogenative N-heterocyclization reaction. Spontaneous formation of a stoichiometric amount of hydrogen (H-2) was observed, and the present reaction proceeded smoothly under an argon atmosphere without oxidants and/or hydrogen acceptors.
TSUJI, YASUSHI;KOTACHI, SHINJI;HUH, KEUN-TAE;WATANABE, YOSHIHISA, J. ORG. CHEM., 55,(1990) N, C. 580-584