. 2016 Feb 5;138(7):2126–2129. doi: 10.1021/jacs.5b12989

Table 1. Boron Reagent Variation.

entry	boron electrophile [B]	temp (°C)	yield (%)^a of 3aa
1	BBr₃^b	45	0
2	BCl₃^b	45	0
3	B-chlorocatecholborane	45	25
4	B-chlorocatecholborane	100	75
5	B-bromocatecholborane	100	48

Isolated yield.

1.0 M solution in DCM.