Synthesis of Boron-Containing Primary AminesReport as inadecuate




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Department of Chemistry, Tamkang University, No. 151 Yingzhuan rd., Tamsui Dist., New Taipei City 25137, Taiwan





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Abstract In this study, boron-containing primary amines were synthesized for use as building blocks in the study of peptoids. In the first step, Gabriel synthesis conditions were modified to enable the construction of seven different aminomethylphenyl boronate esters in good to excellent yields. These compounds were further utilized to build peptoid analogs via an Ugi four-component reaction Ugi-4CR under microwave irradiation. The prepared Ugi-4CR boronate esters were then successfully converted to the corresponding boronic acids. Finally, the peptoid structures were successfully modified by cross-coupling to aryl-heteroaryl chlorides via a palladium-mediated Suzuki coupling reaction to yield the corresponding derivatives in moderate to good yields. View Full-Text

Keywords: boron; multicomponent reactions; Gabriel synthesis; Ugi reaction; peptoid boron; multicomponent reactions; Gabriel synthesis; Ugi reaction; peptoid





Author: Sheng-Hsuan Chung, Ting-Ju Lin, Qian-Yu Hu, Chia-Hua Tsai and Po-Shen Pan *

Source: http://mdpi.com/



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