Arylthienium salt

A -Arylketenimine, 259 Arylmethylenemalondialdehyde, 180 2-Arylmethylene-l-tetralinthione, 217 Arylnitroso compound, 72-78 N-Arylpyrrole, 21-22, 73-74 A1-Aryls ulfiny limine. 259 Arylthienium salt, 233 4-Aryltriazolinedione, 159 N-Arylvinylketenimine, 259 Azabutadiene, 239-299... 

A growing class of potentially useful polar [4+ + 2] cycloadditions employing in situ generated 2-thieniumbutadienes have been reported.63-65 The apparent 4n- participation of arylthienium salts in polar [4+ + 2] cyclizations with alkenes,63 64 alkynes,63 and nitriles65 has been detailed [Eqs. (21)—(23)],... 

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