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Short Paper | Regular issue | Vol 94, No. 10, 2017, pp.1931-1939
Published online, 1st August, 2017
DOI: 10.3987/COM-17-13773
A Convenient Synthesis of Isotellurazoles via Deoxygenation of Isotellurazole Te-Oxide Oligomers by Using a Combination of Ph3P/I2

Yusuke Taneichi, Kazuaki Shimada,* and Toshinobu Korenaga

*Department of Chemistry and Biosciences, Faculty of Science and Engineering, Iwate University, 4-3-5 Ueda, Morioka, Iwate 020-8551, Japan


Ynones and ynals bearing a variety of substituent were converted into isotellurazole Te-oxide oligomers through a convenient procedure via formation and ring closure of β-(N,N-dimethylcarbamoyltellurenyl)alkenyl ketones or aldehydes, and the subsequent conversion of A into the corresponding isotellurazoles B was carried out efficiently by treating with Ph3P/I2 under a rather mild reaction condition.