One possible mechanism for this one-pot four-component reaction is shown inscheme 3 for the case of 2,5,5-trimethyl-6,7-dihydroisoindolo[2,1-c]pyrazolo[1,5-a]quinazoline-8,13(5H,8bH)-dione. The reaction may be started by the initial reaction of3-oxobutanenitrile 2a with hydrazine to the proportion of 3-aminopyrazole 8. 30 Then, thenext step involves the formation of intermediate 10 from condensation reaction between2-phthaldehydic acid 1 and dimedone 4a. Finally, 3-aminopyrazole 8 attacked to10intermediate 10 to form the final product that includes cyclizations and dehydrationssteps with two intermediates 11 and 13.
对于<br>2,5,5-三甲基-6,7-二氢异吲哚并[2,1-c]吡唑并[1,5- <br>a]喹唑啉,这种单锅四组分反应的一种可能机理如方案3所示。-8,13(5H,8bH)-二酮 该反应可以通过<br>3-氧代丁腈2a与肼的初始反应以3-氨基吡唑8的比例开始。30然后,<br>下一步涉及由<br>2-苯二酸1与二甲基酮4a之间的缩合反应形成中间体10 。最后,3-氨基吡唑8攻击<br>10个<br>中间体10形成最终产物,该最终产物包括<br>具有两个中间体11和13的环化和脱水步骤。
正在翻译中..
One possible mechanism for this one-pot four-component reaction is shown inscheme 3 for the case of 2,5,5-trimethyl-6,7-dihydroisoindolo[2,1-c]pyrazolo[1,5-a]quinazoline-8,13(5H,8bH)-dione. The reaction may be started by the initial reaction of3-oxobutanenitrile 2a with hydrazine to the proportion of 3-aminopyrazole 8. 30 Then, thenext step involves the formation of intermediate 10 from condensation reaction between2-phthaldehydic acid 1 and dimedone 4a. Finally, 3-aminopyrazole 8 attacked to10intermediate 10 to form the final product that includes cyclizations and dehydrationssteps with two intermediates 11 and 13.<br>
正在翻译中..