Syntheses and Reactions of Arsine Imines.

Reactions of dimethoxycarbene with N-tosylated imines

The reactions of dimethoxycarbene (DMC; 2), which was generated in situ by thermal decomposition of 2,5-dihydro-2,2-dimethoxy-5,5-dimethyl-1,3,4-oxadiazole (1), with N-tosylated imines of xanthone and 2,3 : 6,7 dibenzosuberenone, 3a and 3d, respectively, led to different adducts with rearranged skeletons. In the case of 3a, the 1 :1 adduct 5 as well as the 2 : 1 adduct 6 were obtained (Scheme 2...

Reductive Coupling Reactions of Nitrones and Imines, Modern Versions

INTRODUCTION Pinacol coupling was first described by Fittig in 1859, when he reported the formation of 2,3dimethyl-2,3-butanediol (1) from acetone and sodium metal. Since then, this ketyl radical anion coupling process has undergone significant advancement, including the development of asymmetric variants. 3 Alternatives to use of strong reducing metals are low valent transition metals and lant...

Catalytic enantioselective Strecker reactions and analogous syntheses.

3.1. Overview 2807 3.2. Chiral Aluminum(III) Complexes as a Catalyst 2808 3.2.1. Aluminum(III)-Salen-Based Catalysts 2808 3.2.2. Aluminum(III)-Binaphthol-Based Catalysts 2810 3.3. Chiral Titanium(IV) Complexes as a Catalyst 2814 3.3.1. Titanium(IV)-Peptide-Based Catalysts 2814 3.3.2. Titanium(IV)-Diol-Based Catalysts 2817 3.4. Chiral Zirconium(IV) Complexes as a Catalyst 2818 3.4.1. The Catalyt...

SYNTHESES AND REACTIONS OF PYRAZINE AND QUINOXALINE 1.1 Pyrazine

Arsine poisoning.

Nature of the Accident Tin is manufactured on a very large scale in Bootle. It occurs naturally as pyrites, and arsenic is an invariable contaminant. The chemical composition of the ores varies considerably but arsenic is present in a concentration of up to 3 %. The tin is liberated from its ores by heating with carbon. The arsenical impurities float to the surface of the molten tin and form a ...