Acyloins from Morita–Baylis–Hillman adducts: an alternative approach to the racemic total synthesis of bupropion
作者:Giovanni W. Amarante、Patrícia Rezende、Mayra Cavallaro、Fernando Coelho
DOI:10.1016/j.tetlet.2008.04.040
日期:2008.6
In this Letter, we describe an easy and straightforward strategy for the preparation of acyloins (α-hydroxyketones) from Morita–Baylis–Hillman adducts, based on a Curtius rearrangement. Different acyloins were obtained with good overall yield (>40% for three steps). To exemplify the synthetic usefulness of this strategy, total synthesis of (±)-bupropion, a dopamine, and nor-epinefrine reuptake inhibitor
Sequential Reduction of Nitroalkanes Mediated by CS<sub>2</sub> and Amidine/Guanidine Bases: A Controllable Nef Reaction
作者:Minsoo Ju、Weiyang Guan、Jennifer M. Schomaker、Kaid C. Harper
DOI:10.1021/acs.orglett.9b02987
日期:2019.11.15
In this letter, we describe a mild, functional group-tolerant reductive Nef reaction that utilizes CS2 and an amidine or guanidine base to sequentially cleave N–O bonds. These conditions transform secondary nitroalkanes to ketones via an isolable oxime with minimal erosion at labile stereogenic carbons, show excellent compatibility with groups sensitive to oxidizing or reducing conditions, display