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Synfacts 2014; 10(1): 0084
DOI: 10.1055/s-0033-1340371
DOI: 10.1055/s-0033-1340371
Metal-Mediated Synthesis
Synthesis of Trisubstituted Alkenylstannanes Starting from Alkynoates
Further Information
Publication History
Publication Date:
13 December 2013 (online)
Key words
tin - boron - copper - alkynoates - tributyltin methoxide - trisubstituted alkenylstannanesSignificance
The authors report a highly regioselective copper-catalyzed synthesis of trisubstituted alkenylstannanes. Through a three-component coupling of alkylboranes, alkynoates and tributyltin methoxide, these trisubstituted alkenylstannanes are obtained in good yields and with high syn selectivity. The appropriate alkylboranes are easily accessible by hydroboration of the corresponding alkenes with the 9-borabicyclo[3.3.1]nonane (9-BBN-H) dimer.
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Comment
Standard methods for the synthesis of alkenylstannanes described by Shirakawa and Hiyama include the palladium- or nickel-catalyzed carbostannylation of internal alkynes with organostannanes which are somewhat difficult to prepare.
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