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. 2013 Nov 18;9:2544–2555. doi: 10.3762/bjoc.9.289

Table 3.

Investigation of CBS reduction of ketone 14.

graphic file with name Beilstein_J_Org_Chem-09-2544-i002.jpg

entry catalyst (mol %) reducing agent T dra

1 17 (10) H3B·SMe2 −78 °C no conversion
2 17 (20) H3B·THF 20 °C complex mixture
3 17 (20) H3B·THF −50 °C 1:1
4 17 (20) catechol borane −78 °C 3:2

aDetermined from 1H NMR spectra of the crude reaction mixtures.