Products from multiple insertion reactions between diisocyanates and antiheteroaromatic 1,4-bis(trimethylsilyl)-1,4-dihydropyrazine: Organosilicon Chem. III, Muench. Silicontage, 3rd
, , , and (Eds.). .
Wiley-VCH Verlag GmbH, (1998)

A review with \textgreater 13 refs. Bifunctional polymethylenediisocyanates O:C:N(CH2)nN:C:O (n = 4, 6) react with the extremely electron-rich 8p electron heterocycle 1,4-bis(trimethylsilyl)-1,4-dihydropyrazine 1 under insertion of the heterocumulene functions into the N-Si bonds. Of the expected electron-rich oligomeric structures the first isolated products are presented, including the cycle structure of the 1:2 addn. product between OCN(CH2)4NCO and 1. This product contains two trimethylsilylurea functionalities. on SciFinder(R)
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