A catalyst-free method for the highly regioselective chloroboration of allenylsilanes is described. In the presence of BCl and 2,6-lutidine, chloroboration of allenylsilanes proceeds smoothly without any catalyst, and the product could be treated with pinacol to afford the corresponding pinacol borates in one-pot reaction. This reaction provides a direct approach to construct valuable 2-silylallylboronate frameworks with operational simplicity and high atom-economy.
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| http://dx.doi.org/10.1021/acs.orglett.9b03720 | DOI Listing |
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