Add time:08/15/2019         Source:sciencedirect.com

The syn-selective aldol reaction of β-chlorovinyl ketones using dienol borinates can be coupled with a trimethylsilyltriflate promoted cyclisation to give cis-dihydropyrones, 4 » 6 » 7. Use of dienol diisopinoeampheylborinates leads to an enantioselective synthesis of dihydropyrones.

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