Asymmetric rhodium carbene insertion into the SiH bond: identification of new dirhodium(II) carboxylate catalysts using parallel synthesis techniques
作者:Richard T. Buck、Diane M. Coe、Martin J. Drysdale、Leigh Ferris、David Haigh、Christopher J. Moody、Neil D. Pearson、J.Bobby Sanghera
DOI:10.1016/s0957-4166(03)00035-1
日期:2003.4
Decomposition of methyl 2-diazophenylacetate in the presence of silanes and a chiral dirhodium(II) catalyst results in SiH insertion of the intermediate carbenoid with varying degrees of enantioselectivity. Newchiral dirhodium(II) carboxylatecatalysts were identified using solution phase parallel synthesis techniques.
Stereoselective Synthesis of Functionalized Pyrrolidines by the Diverted N−H Insertion Reaction of Metallocarbenes with β-Aminoketone Derivatives
作者:Simon M. Nicolle、William Lewis、Christopher J. Hayes、Christopher J. Moody
DOI:10.1002/anie.201511433
日期:2016.3.7
metal‐catalyzed diverted N−H insertion of a range of diazocarbonyl compounds with β‐aminoketone derivatives is described. A number of catalysts (rhodium(II) carboxylate dimers, copper(I) triflate, and an iron(III) porphyrin) are shown to promote the process under mild conditions to give a wide range of highly substituted proline derivatives. The reaction starts as a metallocarbene N−H insertion but is
Stereoselective Synthesis of Highly Substituted Tetrahydrofurans through Diverted Carbene OH Insertion Reaction
作者:Simon M. Nicolle、William Lewis、Christopher J. Hayes、Christopher J. Moody
DOI:10.1002/anie.201502484
日期:2015.7.13
Copper‐ or rhodium‐catalyzed reactions of diazocarbonyl compounds with β‐hydroxyketones give highlysubstitutedtetrahydrofurans with excellent diastereoselectivity. Under mild conditions, the single‐step process starts as a carbene OH insertion reaction, but is diverted by an intramolecular aldol reaction.
Potassium<i>N</i>-Iodo<i>p</i>-Toluenesulfonamide (TsNIK, Iodamine-T): A New Reagent for the Oxidation of Hydrazones to Diazo Compounds
作者:Simon M. Nicolle、Christopher J. Moody
DOI:10.1002/chem.201304656
日期:2014.4.7
A new reagent for the oxidation of hydrazones to diazo compounds is described. N‐Iodo p‐toluenesulfonamide (TsNIK, iodamine‐T) allows the preparation of α‐diazoesters, α‐diazoamides, α‐diazoketones and α‐diazophosphonates in good yield and in high purity after a simple extractive work‐up. α‐Diazoesters were also obtained in high yield from the corresponding ketones through a one‐pot process of hydrazone