with the formation of
问题描述：
with the formation of
原句为：The synthetic sequence described contains firstly a Knoevenagel condensation of 3 and 4 with 11 with the formation of
the 1,3-oxabutadienes 14 and 15,respectively,which then undergo a facial-differentiating hetero-Diels ± Alder reaction with the enol ethers 12 and 13.
里面这个with the formation
答
连带着产生了（with the fomation of后面的就是化学反应的生成物）