DEHYDROGENATIVE N-HETEROCYCLIZATION OF 2-(2-AMINOARYL)ETHYL ALCOHOLS TO INDOLE DERIVATIVES CATALYZED BY (mu-OXO)TETRARUTHENIUM CLUSTER/1,2-BIS(DIPHENYLPHOSPHINO)BENZENE

[摘要]：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.

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