Use of alkyl 2,4,6-triisopropylbenzoates in the asymmetric homologation of challenging boronic estersElectronic supplementary information (ESI) available: Full experimental details and characterisation. See DOI: 10.1039/c1cc14469c
(−)-Sparteine induced lithiation of primary 2,4,6-triisopropylbenzoates and subsequent homologation of boronic esters is reported. A comparative study with lithiated N , N -diisopropylcarbamates has demonstrated the superiority of the hindered benzoate. α-Lithiated alkyl 2,4,6-triisopropylbenzoates...
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