Regioselective synthesis of polysubstituted pyridines via hetero-Diels–Alder reaction of isotellurazoles with acetylenic dienophiles

…, A Moro-oka, H Kogawa, M Sakuraba, S Aoyagi…

Index: Shimada, Kazuaki; Takata, Yukichi; Osaki, Yu; Moro-oka, Akiko; Kogawa, Hisashi; Sakuraba, Maiko; Aoyagi, Shigenobu; Takikawa, Yuji; Ogawa, Satoshi Tetrahedron Letters, 2009 , vol. 50, # 48 p. 6651 - 6653

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Citation Number: 15

Abstract

Treatment of substituted isotellurazoles or their Te-oxides with acetylenic dienophiles efficiently afforded polysubstituted pyridine derivatives through a pathway involving hetero- Diels–Alder reaction of isotellurazoles and the subsequent tellurium extrusion from the intermediary cycloadducts.