Advanced Organic Chemistry

Examenvragen

Explain the following reaction.
How is given cyclopropane synthesized from diethyl malonate in several steps? Choose reagents such that a maximal yield is obtained.
This reaction scheme is an example of a benzannelation reaction. Upon heating, several consecutive steps happen so that the given end product is obtained. Among these steps are three electrocyclic reactions (two 4-electron and one 6-electron), a tautomerization, and a cycloaddition (not necessarily in this order).
Explain formation of this product in presence of base.
Give product A and explain how this reaction occurs.
What products will be formed in following reactions?