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Paper | Special issue | Vol 99, No. 1, 2019, pp.188-199
Published online, 25th June, 2018
DOI: 10.3987/COM-18-S(F)8
Stereodivergent and Stereoselective Synthesis of cis- and trans-4-Substituted Prolinols

Junki Ando, Aoi Tazawa, Kohei Ishizawa, Minoru Tanaka,* and Hiroyoshi Takamura*

*Department of Chemistry, Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushima-naka, Okayama 700-8530, Japan

Abstract

Stereoselective synthesis of 4-substituted prolinol derivatives has been developed. Thus, Suzuki–Miyaura cross-coupling of vinyl triflate provided the common synthetic intermediates toward the stereodivergent synthesis of cis- and trans-4-substituted prolinols. These two kinds of target compounds were obtained by diastereoselective hydrogenation of the coupling products with Pd/C and Crabtree catalyst, respectively. In addition, the obtained 4-substituted prolinol was transformed to the corresponding proline derivative via oxidation in one step.