Alkyl Halide-Free Heteroatom Alkylation and Epoxidation Facilitated by a Recyclable Polymer-Supported Oxidant for the In-Flow Preparation of Diazo Compounds
作者:Simon M. Nicolle、Christopher J. Hayes、Christopher J. Moody
DOI:10.1002/chem.201500118
日期:2015.3.16
simple ketones via diazocompounds, including diazo‐amides and ‐phosphonates, using a recyclable reagent in‐flow, are transient but versatile electrophiles for heteroatomalkylation reactions and for epoxide formation. The method produces no organic waste, with the only by‐products being water, KI and nitrogen, without the attendant hazards of isolation of intermediate diazocompounds.
Engineering of Dual-Function <i>Vitreoscilla</i> Hemoglobin: A One-Pot Strategy for the Synthesis of Unnatural α-Amino Acids
作者:Fengxi Li、Yaning Xu、Yuelin Xu、Hanqing Xie、Junhao Wu、Chunyu Wang、Zhengqiang Li、Zhi Wang、Lei Wang
DOI:10.1021/acs.orglett.3c02537
日期:2023.10.6
to catalyze non-natural reactions remains underexplored. This paper reports a new biocatalytic strategy for the one-pot synthesis of unnatural α-aminoacids. Engineered variants of dual-function Vitreoscilla hemoglobin were found to efficiently catalyze N–H insertion and C–H sp3 alkylation, providing moderate to excellent yields (57%–95%) of unnatural α-aminoacidderivatives and turnover numbers (1425–2375)