[reaction: see text] The reaction of organozinc reagents (ZnEt(2), ZnPh(2)) with cyclic 1,3-diene monoepoxides in the presence of CF(3)COOH gave the cis-addition products. Lewis acids such as (CF(3)CO(2))(2)Zn and ZnCl(2) mediated the nucleophilic addition of ZnEt(2) to cyclooctadiene monoepoxide with high stereoselectivity.
We discovered a unique synthetic
route to construct 2H-pyran-containing
tetracyclic dithienocyclopentapyran (DTCP) and dibenzocyclopentapyran
(DBCP) architectures. The synthesis involves an acid-induced dehydration
cyclization followed by a [1,5] hydride-shift isomerization to form
a cyclopentanone moiety which was converted to the pyran-embedded
tetracyclic products by a CuI-catalyzed intramolecular C–O
bond formation in good yield. DTCP was used as a building block to
prepare an acceptor–donor–acceptor (A–D–A)
type n-type material DTCP-BC leading to a solar cell efficiency of
9.32%.
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.