TY - JOUR T1 - 1,6-Conjugate-addition-induced [2+1] annulation of para-quinone methides and pyrazolones: synthesis of bis-spiro compounds with contiguous quaternary spiro-centers JF - Organic Letters Y1 - 2019 A1 - Kale, Someshwar B. A1 - Jori, Popat K. A1 - Thatikonda, Thanusha A1 - Gonnade, Rajesh G. A1 - Das, Utpal AB -

A diastereoselective formal 1,6-conjugate-addition-mediated [2 + 1] annulation reaction using p-quinone methides and pyrazolones has been described. The corresponding bis-spiro[cyclohexadienone-cyclopropane-pyrazolone] compounds were obtained in very good yield under mild reaction conditions.

VL - 21 IS - 19 U3 -

Foreign

U4 -

6.555

ER -