Synthesis of 1,2-dihydro-1-oxophthalazin-4-yl trifluoromethanesulfonate and its application in the synthesis of 4-(aryl/heteroaryl/alkynyl)phthalazin-1(2H)-one
作者:Ganesh Raosaheb Dhage、Santosh Rangnath Deshmukh、Shankar Ramchandra Thopate
DOI:10.1039/c5ra03390j
日期:——
The regioselective synthesis of 1,2-dihydro-1-oxophthalazin-4-yl trifluoromethanesulfonate (3a) has been reported. The reaction of Tf2O (2a) with phthalhydrazide (1a) provides a rapid access to 3a with an excellent yield and a high level of regioselectivity. The synthetic utility of this triflate is further enhanced by carrying out the successful Suzuki and Sonogashira coupling reactions for the first
已经报道了1,2-二氢-1-氧代酞嗪-4-基三氟甲磺酸盐(3a)的区域选择性合成。Tf 2 O(2a)与邻苯二甲酰肼(1a)的反应可快速获得3a,并具有优异的收率和较高的区域选择性。通过在3a上首次成功进行Suzuki和Sonogashira偶联反应,可进一步提高该三氟甲磺酸酯的合成效用,从而以高收率轻松获得一系列生物学上重要的4-芳基/杂芳基/炔基邻苯二氮酮。