Libraries of benzoxanthenes, as well as of benzochromenes, were efficiently synthesized via one-pot, three-componentreactions of 2-naphthol, aldehydes, and cyclic 1,3-diketones/malononitrile/ethyl cyanoacetate in the presence of catalytic amount of ceric ammonium nitrate (CAN) under solvent free conditions. The protocol offers rapid synthesis of structurally diverse benzoxanthenes and benzochromenes
Efficient One-Pot Condensation of <font>β</font>-Naphthol, Aldehydes, and Cyclic 1,3-Dicarbonyl Compounds Catalyzed by <i>p</i>-TSA Under Solvent-Free and Sonication Conditions
作者:Jianjun Li、Jia Li、Jin Fang、Weike Su
DOI:10.1080/00397910903029966
日期:2010.3.12
A facile and efficient procedure has been developed by one-pot condensation of β-naphthol, aldehydes, and cyclic 1,3-dicarbonyl compounds for the synthesis of 8,9,10,12-tetrahydrobenzo[a]xanthen-11-one or 8,9-dihydrobenzo-[f]cyclopenta[b]chromen-10(11H)-one derivatives catalyzed by p-toluenesulfonic acid undersolvent-free and sonication conditions.
Strontium triflate catalyzed one-pot condensation of β-naphthol, aldehydes and cyclic 1,3-dicarbonyl compounds
作者:Jianjun Li、Wenyuan Tang、Linmei Lu、Weike Su
DOI:10.1016/j.tetlet.2008.09.129
日期:2008.12
An efficient one-pot condensation of β-naphthol, aldehydes, and cyclic 1,3-dicarbonyl compounds has been achieved with strontium triflate as a catalyst, thus a variety of 8,9,10,12-tetrahydrobenzo[a]xanthen-11-one or 8,9-dihydrobenzo-[f]cyclopenta[b]chromen-10(11H)-one derivatives were prepared in good yields.
以三氟甲磺酸锶为催化剂,可以实现β-萘酚,醛和环状1,3-二羰基化合物的有效一锅缩合,因此,各种8,9,10,12-四氢苯并[ a ] xanthen-11以高收率制备了一个或8,9-二氢苯并[[ f ]环戊[ b ]铬n-10(11 H)-一衍生物。