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- W2029970090 abstract "Abstract Several procedures, which are based on the zirconium-catalyzed methylalumination of 1-alkynes ( 5 ), have been tested for the regio- and stereoselective synthesis of ( E )-2-methyl-1-alkenyltrimethylstannanes ( 4 ). The best one among these procedures as regards simplicity and mildness is that based on the water-accelerated methylalumination of compounds 5 , followed by treatment with a THF solution of Me 3 SnCl. This procedure allows the preparation of ( E )-2-aryl-2-methylethenyltrimethylstannanes, ( E )-2-benzyl-2-methylethenyltrimethylstannanes and ( E )-2-(1-cycloalkenyl)-2-methylethenyltrimethylstannanes in quite high yields. On the other hand, ( E )-2-alkyl-2-methylethenyltrimethylstannanes having high regio- and stereoisomeric purities have been effectively and conveniently synthesized by a reaction sequence involving the zirconium-catalyzed methylalumination of compounds 5 according to a standard protocol and the conversion of the alkenyldimethylalanes ( 7 ) so obtained into the corresponding methylalanates ( 10 ), followed by treatment with a THF solution of Me 3 SnCl." @default.
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- W2029970090 title "Regio- and stereoselective synthesis of (E)-2-methyl-1-alkenyltrimethylstannanes from 1-alkynes" @default.
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