Hexahydropyrimidine derivatives
    35.
    发明授权
    Hexahydropyrimidine derivatives 失效
    六氢嘧啶衍生物

    公开(公告)号:US5106975A

    公开(公告)日:1992-04-21

    申请号:US438164

    申请日:1989-11-20

    Abstract: When a phenol having substituents in at least the 2- and 4-positions but having a hydrogen atom in the 6-position, or a phenol having substituents in at least the 2- and 6-positions but having a hydrogen atom in the 4-position is reacted with formaldehyde and 1,3-propanediamine, a unique insertion-condensation reaction occurs whereby the product is a hexahydropyrimidine derivative which may be represented by the general formula ##STR1## wherein R.sub.1 is (i) a 2-hydroxybenzyl group having an inert substituent (preferably a hydrocarbyl substituent) in at least the 3- and 5-positions or (ii) a 4-hydroxybenzyl group having an inert substituent (preferably a hydrocarbyl substituent) in at least the 3- and 5-positions; and R.sub.2 is (i) a 2-hydroxybenzyl group having an inert substituent (preferably a hydrocarbyl substituent) in at least the 3- and 5-positions or (ii) a 4-hydroxybenzyl group having an inert substituent (preferably a hydrocarbyl substituent) in at least the 3- and 5-positions or (iii) a hydrogen atom. Uses for such compounds include their use as antioxidants and stabilizers for various substrates, such as fuels, lubricants, and functional fluids.

    Abstract translation: 当在至少2位和4位具有取代基但在6位具有氢原子的苯酚或在至少2位和6位具有取代基但在4-位具有氢原子的苯酚时, 位置与甲醛和1,3-丙二胺反应,发生独特的插入缩合反应,由此产物是六氢嘧啶衍生物,其可以由通式(I)表示,其中R 1是(ⅰ)2-羟基苄基 在至少3-和5-位具有惰性取代基(优选烃基取代基)的基团或(ii)在至少3-和5-位具有惰性取代基(优选烃基取代基)的4-羟基苄基 ; 并且R 2是(i)在至少3-和5-位具有惰性取代基(优选烃基取代基)的2-羟基苄基或(ii)具有惰性取代基(优选烃基取代基)的4-羟基苄基, 至少在3-和5-位,或(iii)氢原子。 这些化合物的用途包括它们作为抗氧化剂和用于各种底物的稳定剂,例如燃料,润滑剂和功能性流体。

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