Majumdar, K. C.; Choudhury, P. K.; Biswas, P. published the artcile< Cyclization of 3-(2-cyclopenten-1-yl)-4-hydroxy[1]benzopyran-2-one>, Synthetic Route of 112-63-0, the main research area is cyclization cyclopentenylhydroxybenzopyranone; benzopyranone cyclopentenylhydroxy preparation cyclization; furochromone fused derivative preparation rearrangement; furocoumarin fused derivative preparation.
The title compound (I) was prepared by reaction of 3-chlorocyclopentene with 4-hydroxy[1]benzopyran-2-one. I or its acetate, on treatment with pyridine hydrotribromide in dichloromethane at 0-5° for 2 h, gave fused furochromone II in 90% yield. II, on refluxing in 50% sulfuric acid, underwent rearrangement to furnish fused furocoumarin III in 87% yield.
Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry published new progress about Cyclization. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Synthetic Route of 112-63-0.
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics