The configurational stability of enantiopure chiral (2, 4, 6-triisopropylbenzoyl) oxy-[D1] methyllithium generated by a tin− lithium exchange was tested on the macroscopic time scale, employing trapping experiments with benzaldehyde. It was found to be configurationally stable for minutes at− 78° C and to be an appropriate substitute for the carbamoyloxy-substituted analogue in terms of cleavage. Its addition to several ...