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. 2020 Nov 17;60(20):11068–11091. doi: 10.1002/anie.202010631

Scheme 6.

Scheme 6

Sequential assembly with two Grignard reagents, titanium as the coupling agent and under Fe or Co catalysis. TMEDA=tetramethylethylenediamine; DMPU=N,N′‐dimethylpropyleneurea.