Stereoselective synthesis of new hetero(P, Si, Ge, Sn)cyclic derivatives from zirconium diyne and diene complexes

Autor:	Maryam Mirza-Aghayan, Gabriel Oba, G. Manuel, Max Koenig, Rabah Boukherroub
Rok vydání:	1998
Předmět:	Zirconium Diene Electrophilic addition Organic Chemistry Heteroatom chemistry.chemical_element Biochemistry Medicinal chemistry Inorganic Chemistry chemistry.chemical_compound chemistry Diphosphines Electrophile Materials Chemistry Stereoselectivity Physical and Theoretical Chemistry Selectivity
Zdroj:	Scopus-Elsevier
ISSN:	0022-328X
DOI:	10.1016/s0022-328x(98)00700-1
Popis:	The dipropargylic derivatives of Si, Ge, P, 1a–c, react with the zirconocene entity ‘Cp2Zr’ and give the intermediate bicyclocomplexes 2a–c characterized by 1H and 31P-NMR. The electrophilic addition of H+, Br2 leads to the corresponding exo dienic metallacyclopentanes 3,4. The cyclozirconation reaction with hetero-diallylic compounds 5a–d gives the metallacyclopentanes 7–15, after reaction with different electrophiles such as H+, PCl3, PhPCl2, Ph2PCl or Ph2PCl(BH3), Br2. The cyclozirconation reaction of diynes is stereoselective and leads to the E,E-exocyclic dienes whereas the selectivity of cyclozirconation of dienes depends on the substituents on the heteroatom.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0cbc5517bd97fdf4246273a67c16c263 https://doi.org/10.1016/s0022-328x(98)00700-1 Zobrazit plný text záznamu Full Text from ScienceDirect