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14 Six-Membered Hetarenes with One Chalcogen

DOI: 10.1055/sos-SD-014-00001

Thomas, E. J.Science of Synthesis, (2003141.

General Introduction

Six-membered oxygen containing heterocycles are an important group of compounds widely dispersed throughout the plant kingdom. They are components of many biologically active compounds including drugs. This volume of Science of Synthesis covers the synthesis of six-membered hetarenes with one chalcogen, i.e. oxygen, sulfur, selenium, or tellurium, in the heterocyclic ring, including pyrylium salts and pyranones together with their benzo-fused analogues.

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Meeeeeeeeee ee eeeeeeee eeee eeeeeeeeeee eeeeee, eeeeeeee 8M-eeeee-8-eee (8) eeee 8-eeeeeee- ee 8-eeeeeeeeeeeeeee eeeee, e.e. 88. Meeeeeeee eeee eeeeeeeeeeeeee eeeeeeee eeee eeeee ee M8 eeeeee 8-eeeeeeeeeeeee eeeee eeeee eeeeeeeeee eeeeeeeeeee, e.e. 88, ee 8M-8,8-eeeeeeeeeeeee (e.e., eeeeeeeeee ee 8,8-eeeeeeee-8M-eeeee-8-eee 88 eeee eee 8,8-eeeeeeee eeeeeeeeee 88) ee ee eeeeee ee eee eeeeeeeeeeeeee eeeeeee ee eeee. 8M-Meeee-8-eeee eeeee eeee M- eee M-eeeeeeeeeeee ee eeee M8, eeee eeee eeeeeee, eee ee M8 eee eee eeee eeeeeeee ee eeeeeeee. Meeeeeeeee ee 8M-eeeee-8-eee (8) eeeee 8M-eeeee-8-eee (8) eee e π-eeeeeeeee eeee ee eeeeeeeeeeeee (Meeeee 8).[‌88‌]

Meeeee 8 Meee Meeeeeeee ee 8M-Meeee-8-eeee eee 8M-Meeee-8-eeee[‌8‌,‌8‌,‌88‌‌88‌]

Mee eeee eeee ee eeeeeeeeee eeeeeeee eeeee eeeeeee eeeee eeeeeee eeeeeeeeee. Mee eeeeeee, eee eeeeee eeeeeeeeeeee ee 8,8,8-eeeeeeeeeeeeeeeee eeeeeeeeeeeeeeeee (88) (Meeeee 8), eeeee ee eeeeeeeeeeee eeeeeeeee, eee eeee eeeee eee e eeee eeee, eee eeee eeee ee eeeeee eeee ee e eeeeeeeeeeeeeee ee eeeeeeee-eeeeeeee eeeeeeeee.[‌88‌] 8-Meeeeeeeeeeee eeeee eeee eeee ee eeeeeeeeeeee eeeeeeee eeeee ee eee eeeeeeeeee eeee eeee ee eee eeeeee ee eeeeeee eee eee ee eee 8-M-eeeeeeeeee ee eeeeeeeeeee eeeeeeeee (e.e., 8-eeee-8-eeeeeeeeeeeee) eeeee, e.e. eeeeeeeeeeeee.[‌88‌] Meeeeeeeeeee eeeee eee eeeee eeeeeeee eee eee eeeeeeeee eeeeeeeee eeee eeee eeee eeeeeeeee eeeeeee ee eeeee eeeeeeeeeeeee eeeeeeeeee eee eeeeeeee eeeeeeeee ee eee eeeeeeeeeeee eeeeee.[‌8‌‌8‌]

Meeeeeee eeeee eee eeeee ee eeee eeeeeeeeee eeeeeee eeeeeeee eeeeeeeee eeeeeeeeee eeeeee eeeeeeeee eeee ee eee eeeeeeeeee eeeee eeee (88) ee eeee eeeeeee eeeeeeee, eeee ee eeeeeeeee (88). Meee ee eeeee eeeeeeeee, eee eeeee eeeeeeeee eeee eee eeeee eeeeeeeeee ee eee eeeeeeeeee eeeee, eeee eee eeeeeeeee ee ee eeeeeeeee eeee eeeeee eeeeeeeeeeeeeee, eeee ee eeeeeeee (88), eeeee ee eeee ee eeeeee eee eeeeeeee ee eeeee ee eeee (Meeeee 8). Meee eeee eeeeeee eeeeeeee, e.e. eee eeeeeeeeee eeeeee eeeeeee eeeeeeee, eeee eeeeeee eeeee eee eeeeeeee eeeeeeeeeeeee, eee eee ee eeeeeeee eeee eee eeeeeeeeeee eeeeeeeee ee eeee eeeeee.

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