3-aryl-1 -stannyl-1 -alkene 1 -alkyne

Borabicyclo[3.3.1]nonane (9-BBN) has found use in the selective hydro-boration of alkenes in the presence of other reducible functional groups and its reaction with alkynylstannates has been studied. o-Stannyl- and a-silyl-substituted crotyl-9-BBN show promise as reagents for the stereo-regulated synthesis of acyclic systems. A series of papers covers the question of olefin-alkyl exchange in. 5-alkyl-9-BBN s, " the kinetics of reduction of substituted benzaldehydes with 9-BBN, and the kinetics and mechanism of hydroboration of alkynes with 9-BBN dimers. Selective dehalogenation of tertiary alkyl, benzyl, and allyl halides in the presence of secondary or primary alkyl or aryl halides is possible with (165). The... 

Alkynes are converted to ( )-alkenes in a microwave-assisted hydrosilylation-Stille coupling process, and both reactions are catalyzed by (Ph3P)4Pd. Interestingly, arylation of tributylstannylacetylene is achieved via a Stille coupling and then C-stannylation. ... 

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