Compounds of the formula I ##STR1## wherein R, R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 have the meaning given in claim 1 are formed by thermal rearrangement of the isomers of formula V ##STR2## especially in the presence of basic catalysts. The compounds are corrosion inhibitors for organic materials, in particular coating materials and lubricants. In these substrates they also act as antioxidants and light-stabilizers and are very stable to heat.
公式I的化合物 ##STR1## 其中R,R.sup.1,R.sup.2,R.sup.3,R.sup.4和R.sup.5具有权利要求1中所给定的含义,是通过公式V的异构体的热重排形成的。##STR2## 特别是在碱性催化剂的存在下。这些化合物是有机材料的腐蚀
抑制剂,特别是涂料材料和润滑剂。在这些基底中,它们还起着
抗氧化剂和
光稳定剂的作用,并且非常稳定于热。