One-pot synthesis of telluroketene acetals and haloketene acetals using sp 2 geminated hetero organobismetallic intermediates

…, PR de Oliveira, ACM Baroni, FA Marques, R Labes…

Index: Guerrero Jr., Palimecio G.; De Oliveira, Paulo R.; Baroni, Adriano C.M.; Marques, Francisco A.; Labes, Ricardo; Dabdoub, Miguel J. Tetrahedron Letters, 2012 , vol. 53, # 13 p. 1582 - 1586

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Abstract

A novel one-pot synthesis of 1, 1-dihalo-1-alkenes and 1, 1-bis (butyltelluro)-1-alkenes was developed from hydrozirconation of alkynylzinc bromide with Cp2Zr (H) Cl and subsequent capture of the Zn/Zr 1, 1-heterodimetallo-1-alkene intermediates with halogen and tellurium electrophiles. These protocols, which include multiple reactions in a one-pot procedure, allow the preparation of the potentially useful haloketene acetals and telluroketene ...

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