Tetrahedron Letters p. 447 - 450 (1995)
Update date:2022-07-30
Topics:
Baccolini
Orsolan
Mezzina
Conjugated azoalkenes 2 react at reflux toluene with fused benzothiadiphosphole 1 (or 4) to give the diazaphosphole 3 in 25-52% yields. With this route it is possible to isolate the so far unknown 3a which is difficult to obtain in other reported conditions. The P atom involved in this cydoaddition is the one between the two S atoms.
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(1942)
