The present invention is directed to provide a novel preparation of anticancer-active tricyclic compounds via alkyne coupling reaction. The present invention provides a process for preparing a compound of formula (Ia) or (Ib):
wherein R1 is optionally substituted C1-6 alkyl, etc.; W is O, S or NR2; R2 is hydrogen atom, etc.,
which comprises Step (a) in which a compound of formula (II):
wherein R1 is the same as defined above,
and a compound of formula (III) or (IV):
wherein R2 is the same as defined above; R3 is hydrogen atom, etc.; X is halogen atom, etc., are reacted in the presence of a base, a copper catalyst and a palladium catalyst in an aprotic polar solvent.
本发明旨在提供一种通过炔基偶联反应制备抗癌活性
三环化合物的新方法。本发明提供了一种制备式(Ia)或(Ib)化合物的过程:其中R1是可选的取代C1-6烷基等;W是O,S或NR2;R2是氢原子等。包括步骤(a),其中式(II)的化合物:其中R1与上述定义相同,和式(III)或(IV)的化合物:其中R2与上述定义相同;R3是氢原子等;X是卤素原子等,在无
水极性溶剂中,在碱,
铜催化剂和
钯催化剂的存在下反应。