The photolysis of a series of gem-dimethyl 4-carbomethoxy 3H-pyrazoles, obtained from a ummon carbanionic precursor (preceding articals) leads to Cyclopropenic esters.These can be hydrogenated to the corresponding cis-disubstituted cyclopropanes which are direct precursors of chrysanthemates, pyrethric esters and analogous halopyrethroids.
从一个ummon碳负离子前体(先前的文献)中获得的一系列宝石-二甲基4-羰甲氧基
3H-吡唑的光解反应生成环
丙烯酸酯,它们可以被氢化成相应的顺式-二取代的
环丙烷,它们是
菊酸酯,拟
除虫菊酯的直接前体。酯和类似的类
胡萝卜素。