Li, Xiaohu published the artcilePhosphine-catalyzed sequential (2+3)/(2+4) annulation of γ-vinyl allenoates: access to the synthesis of chromeno[4,3-b]pyrroles, Recommanded Product: Methyl 2-(3-formyl-4-hydroxyphenyl)acetate, the publication is Chemical Communications (Cambridge, United Kingdom) (2021), 57(77), 9934-9937, database is CAplus and MEDLINE.
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.
Chemical Communications (Cambridge, United Kingdom) published new progress about 61874-04-2. 61874-04-2 belongs to esters-buliding-blocks, auxiliary class Benzene,Phenol,Ester,Aldehyde, name is Methyl 2-(3-formyl-4-hydroxyphenyl)acetate, and the molecular formula is C10H10O4, Recommanded Product: Methyl 2-(3-formyl-4-hydroxyphenyl)acetate.
Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics