Add time:09/25/2019         Source:sciencedirect.com

Treatment of 1-chlorovinyl p-tolyl sulfoxides, which were synthesized from cyclic ketones and chloromethyl p-tolyl sulfoxide in three steps in good yields, with N-lithio arylamines gave sulfinylaziridines in high yields. On treatment with N-lithio aniline or N-lithio p-chloroaniline, the sulfinylaziridines gave α-amino aldehydes in high yields. The α-amino aldehydes were converted to amino alcohols and α-amino acid methyl esters in moderate to good yields. This procedure offers an efficient method for synthesis of cyclic α-quaternary α-amino aldehydes, amino alcohols, and α-amino acid derivatives from cyclic ketones.

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