Journal
CHEMISTRY-AN ASIAN JOURNAL
Volume 14, Issue 24, Pages 4553-4556Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/asia.201900839
Keywords
boronate ester; chemoselective; homogeneous catalysis; hydroboration; zinc
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Funding
- SERB [EMR/2016/000367]
- Indian Institute of Science (IISc) start-up research grant
- Kishore Vaigyanik Protsahan Yojana (KVPY)
- DST inspire faculty award [DST/INSPIRE/04/2015/000785]
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A regioselective hydroboration of alkynes has been developed by using commercially available zinc triflate as a catalyst, in the presence of catalytic amount of NaBHEt3. The reaction tolerates a wide range of terminal alkynes having several synthetically useful functional groups and proceeds regioselectively to furnish hydroborated products in moderate to excellent yields. This system shows moderate chemoselectivity towards terminal C equivalent to C bond over terminal and internal C=C bond and internal C equivalent to C bond.
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