Heterocyclic arsenic compounds reactions

Interesting chemistry has been observed in the process of attaching pendant donors and propylene chloride substituents to arsenic-sulfur heterocycles <85CB2714>. The arsine oxide (84) was converted into the heterocycle (85) by reaction with 1,3-propane dithiol in the presence of potassium hydroxide. Deprotonation of this compound with LDA at — 50 °C to — 35 C afforded the 2-lithio intermediate... 

A short time ago numerous triorganyl-cyclotriphosphanes have become accessible as pure substances on various synthetic routes (2). Moreover, three-membered phosphorus heterocycles with carbon, silicon, germanium, arsenic, boron, and sulfur as hetero ring atoms could be synthesized (2). Recently, we have found that such compounds with elements of the fifth periodtare als stable enough fop existence. Through the reaction of K(Bu )P-P(Bu )K with Bu S C1 or Bu -SnC at -78°C, the diphosphastib rane ... 

During the decade 1996-2005, in this category of heterocycles, the major interest has been the synthesis and reactions of benzarsepins, arsocanes, and cyclic esters of arsenic(m) acids. In contrast, little work has been done in the area of arsine heteromacrocycles with two or more arsenic atoms. Readers are referred to the corresponding sections of CHEC-II(1996) <1996CHEC-II(9)971 > for information concerning earlier works on macrocyclic polyftertiary arsines) and related compounds. 

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