Reaction Workup and Quenching

In the [supporting information](https://pubs.acs.org/doi/suppl/10.1021/acs.orglett.6b00799/suppl_file/ol6b00799_si_001.pdf) of [synthetic paper by Buchwald's group](https://pubs.acs.org/doi/10.1021/acs.orglett.6b00799), They use 2-MeTHF as solvent (See B. General Procedures for Amination part, page 8). After the reaction ends and cools the mixture to room temperature, they dilute it using dichloromethane.


Question 1: Why do they use dichloromethane, instead of 2-MeTHF which is the solvent of the reaction? Any particular reason? Also I have seen another paper that Buchwald's group also used dichloromethane in prior to filtration, and in that paper they used toluene as solvent.


Question 2: What is 'kinetic' quench? I searched for it literally in Google, but I couldn't find anything about it.


