SCHEDULED MAINTENANCE
Treatment of cholest-4-ene-3,6-dione (1) with an excess of hydrazoic acid–boron trifluoride in chloroform yields 3-aza-A-homocholest-4a-eno[3,4-d]tetrazol-6-one (2), 3,6-diaza-AB-bishomocholest-4a-eno[3,4-d][6,7-d]bis-tetrazole (7), and 3-aza-A-homocholest-4a-ene-4,6-dione (11). The bistetrazole (7) was obtainable from the monotetrazole (2).
H. Singh, K. K. Bhutani and L. R. Gupta, J. Chem. Soc., Perkin Trans. 1, 1976, 1210 DOI: 10.1039/P19760001210
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