873-49-4Relevant articles and documents
S-Alkylation of α-Thioether Iron Compounds by + and +
Guerchais, Veronique,Thepot, Jean-Yves,Lapinte, Claude
, p. 1554 - 1556 (1989)
Treatment of the thiomethyl complexes (R=Me or Ph0 with + or (CO)2(=CH2)>+ results in S-alkylation, affording the sulphonium salts >+ and Fe(η-C5Me
Dichloromethane activation by chlorochromium(II) complexes with TpiPr2: Generation of an electrophilic Cr-methylene species without the action of an external Cl-abstraction reagent
Sugawara, Ken-Ichiro,Hikichi, Shiro,Akita, Munetaka
, p. 1094 - 1095 (2001)
Five-coordinated chlorochromium(II) complexes with TpiPr2 activate CH2Cl2 to give a metal-carbene species without the action of an external Cl-abstraction reagent, and the resulting methylene fragment is trapped by nucleop
Gerdil
, p. 2100 (1970)
Scalable On-Demand Production of Purified Diazomethane Suitable for Sensitive Catalytic Reactions
Sheeran, Jillian W.,Campbell, Kiersten,Breen, Christopher P.,Hummel, Gerald,Huang, Changfeng,Datta, Anamika,Boyer, Serge H.,Hecker, Scott J.,Bio, Matthew M.,Fang, Yuan-Qing,Ford, David D.,Russell, M. Grace
, p. 522 - 528 (2021/02/03)
We have developed a convenient development-scale reactor (0.44 mol/h) to prepare diazomethane from N-methyl-N-nitroso-p-toluenesulfonamide (MNTS) in ~80% yield. Diazomethane (CH2N2) made with this reactor is extracted into nitrogen gas from the liquid reaction mixture, effectively removing it from reagents and byproducts that may interfere in subsequent reactions. Vertically oriented tubular reactors were used to produce and consume diazomethane in situ. Key features of this reactor include high productivity and correspondingly low reactor volume (reactor volume/liquid flow rate = 6.5 min) and a commercially available gas/liquid separator equipped with a selectively permeating hydrophilic membrane. The design of the reactor keeps the inventory below 53 mg of CH2N2 during normal operation. The reactor was demonstrated by generating CH2N2 that was used in a connected continuous reactor. We evaluated esterification reactions and a continuous Pd-catalyzed cyclopropanation reaction with the reactor and achieved high conversion with 1.5 and 4.1 equiv of MNTS precursor, respectively.
Zn-Mediated Hydrodeoxygenation of Tertiary Alkyl Oxalates
Ye, Yang,Ma, Guobin,Yao, Ken,Gong, Hegui
supporting information, p. 1625 - 1628 (2021/01/18)
Herein we describe a general, mild, and scalable method for hydrodeoxygenation of readily accessible tertiary alkyl oxalates by Zn/silane under Ni-catalyzed conditions. The reduction method is suitable for an array of structural motifs derived from tertiary alcohols that bear diverse functional groups, including the synthesis of a key intermediate en route to estrone.