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Synthesis 1992; 1992(3): 267-269
DOI: 10.1055/s-1992-26085
short paper
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Synthesis of New Heterocycles with Dicoordinated Phosphorus: 3-Substituted Thiazolo[3,2-d][1,4,2]diazaphosphole and its 5,6-Dihydro and Benzo Derivatives

Raj K. Bansal* , Ruchi Mahnot, Dinesh C. Sharma, Konstantin Karaghiosoff
  • *Department of Chemistry, University of Rajasthan, Jaipur-302004, India
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Publication Date:
17 September 2002 (online)

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The 3-substituted 2-aminothiazolium bromides 1-3 undergo cyclocondensation with phosphorus trichloride in acetonitrile in the presence of triethylamine to give the 3-substituted 5,6-dihydrothiazolo[3,2-d] [1,4,2]diazaphospholes 4, thiazolo[3,2-d] [1,4,2] diazaphosphole 5 and its benzo derivatives 6. The products are characterized by 31P, 1H and 13C NMR spectra. Dimethyl sulfate alkylates 5 at N-7.