1. The problem statement, all variables and given/known data What is the major product of the following reaction? (Its CHCl3) 2. Relevant equations Reimer Tieman reaction 3. The attempt at a solution This reaction looks like the Riemer-Tiemann reaction. The only difference is the reactant. First step is the formation of carbene. Then either of the reactions are possible: But since carbene does not react like an electrophile, It seeks the carbon with higher electron density. That is, it attacks position 3 or 4 to form product (B). But in case of Pyrole, the major products are: Why is there a difference in the type of products?