Li, Xiaohu; Huang, You published their research in Chemical Communications (Cambridge, United Kingdom) in 2021. The article was titled 《Phosphine-catalyzed sequential (2+3)/(2+4) annulation of γ-vinyl allenoates: access to the synthesis of chromeno[4,3-b]pyrroles》.Recommanded Product: Ethyl propiolate The article contains the following contents:
A phosphine-catalyzed cascade (2+3)/(2+4) cyclization reaction of γ-vinyl allenoates I (R1 = Me, Et, i-Pr, PhCH2) with aldimine esters II (R2 = 4-Me, 5-Et2N, 6-F, 3,4-benzo, etc.; R3 = Me, Et, i-Pr) has been developed to provide a series of chromeno[4,3-b]pyrroles III that contain three contiguous stereogenic centers. The method gives good yields, excellent chemoselectivity and diastereoselectivity under mild conditions. The experimental process involved the reaction of Ethyl propiolate(cas: 623-47-2Recommanded Product: Ethyl propiolate)
Ethyl propiolate(cas: 623-47-2) is a clear colorless to pale yellow liquid that is soluble in ethanol, ether and chloroform. It an important organic chemical raw material and pharmaceutical intermediate. Ethyl propargylate is obtained by oxidation of propargyl alcohol to propargylic acid followed by esterification.Recommanded Product: Ethyl propiolate
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Ester – an overview | ScienceDirect Topics