Rapid Synthesis of 4-Benzyl-4-aminopiperidines by Addition of Grignard Reagents to <i>N</i>-(1-Boc-Piperidin-4-ylidene)-<i>tert</i>-butanesulfinyl Imine
作者:Ian Collins、John Caldwell
DOI:10.1055/s-2006-950442
日期:2006.9
4-benzyl-4-aminopiperidines by the addition of benzyl Grignard reagents to sulfinyl imines were developed. The hydration-prone tert-butanesulfinyl imine derived from N-Boc-piperidin-4-one was trapped as a stable alpha-(N-sulfinyl)aminonitrile, which underwent displacement of the nitrile on treatment with Grignard reagents. Alternatively, benzyl and allyl Grignards added to the sulfinyl imine in situ