Table 2.

Scope of Catechol Synthesis

entry	silanol	catechol	yield, %a
1			3b	81
2			3c	94
3			3d	57b
4			3e	77
5			3f	68c
6			3g	93
7			3h	78
8			3i	87
9			3j	88
10			3k	76c
1l			3l	62b,d
12			3m	84b,d
13			3n	83b,d
14			3o	70b,d
15			3p	60b,d
16			3q	47b,d,e
17			3r	65b,d
18			3s	35b,d
19			3t	29b,d
20			3u	76b,d
21			3v	54b,d

^aIsolated yields.

^bIsolated as bis-acetates by further treatment of the catechols with Ac₂O and pyridine in the same pot.¹²

^cMajor isomer is shown (34:1).

^dPhCF₃ was used instead of PhMe, PhI(OAc)₂ (1.5 equiv), 120 °C.

^e10 mol% Pd(OPiv)₂ was used.