139591-55-2Relevant academic research and scientific papers
A Study of Claisen Rearrangements Of (1,1-Dimethyl-3-Prop-2-Ynyloxy)--1-Benzopyran-4-One Derivatives
Joshi, Shubhangi C.,Trivedi, Kunjbihari N.
, p. 563 - 570 (2007/10/02)
The Claisen Rearrangements of 7-(1,1-dimethyl-3-prop-2-ynyloxy) derivatives of 7-hydroxy-8-methyl-3-phenyl--1-benzopyran-4-one (1), 2,8-dimethyl-7-hydroxy-3-phenyl--1-benzopyran-4-one (5), 8-(prop-2-enyl)-7-hydroxy-3-phenyl--1-benzopyran-4-one (8), 8-(1-phenyl-2-propenyl)-7-hydroxy-3-phenyl--1-benzopyran-4-one (11) was carried out to furnish novel products 1,2,3,7-tetrahydro-1,1,3-trimethyl-6-phenylcyclopenta-(2,3-h) -benzopyran-2,7-dione (3), (7), and 2,2-dimethyl-7-phenyl-3(prop-2-enyl)pyrano (2,3-h) (8H)-1-benzopyran-8-one (10) along with expected products (4) and (13).Probable mechanisms of the rearrangements are discussed.
