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2004
Organo-tellurium compounds
S 0140
Microwave-Assisted Group-Transfer Cyclization of Organotellurium Com— It is found that alkyl aryl tellurides of type (V) and (VII) efficiently and
47- 150 pounds.
rapidly undergo group-transfer cyclization on microwave irradiation in ethylene glycol
and sometimes also in water. Unfortunately, the cyclization giving 5-membered ring
systems proceeds with low stereoselectivity or without stereoselectivity. The benzylic
selenide (Xa) can also undergo group-transfer cyclization, in contrast to other selenide
derivatives such as (Xb) and primary alkyl aryl selenides. — (ERICSSON, C.;
ENGMAN*, L.; J. Org. Chem. 69 (2004) 15, 5143-5146; Dep. Chem., Org. Chem.,
Univ. Uppsala, S-751 24 Uppsala, Swed.; Eng.) — Jannicke
2004
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