. Author manuscript; available in PMC: 2013 Dec 21.

Published in final edited form as: Angew Chem Int Ed Engl. 2012 Nov 19;51(52):13054–13057. doi: 10.1002/anie.201207820

Table 1.

Ring expansion of various 1-sulfonyl 4-tertiary alcohol triazoles 3 yielding products 5. General reaction conditions: 1-sulfonyl triazole (1.0 mmol, 1.0 equiv.), rhodium(II) octanoate (0.5 mol%), CHCl₃ (2.0 mL), 70 °C, mw, 5 – 60 min. All values shown represent isolated yields.

Entry	Triazole	[°C/min]	Product	Yield

1	3a: n = 1	70/15	5a: n = 1	91%
2	3b: n = 2	70/15	5b: n = 2	93%
3	3c: n = 3	70/15	5c: n = 3	94%

4	3d: R = p-OMePh	70/60	5d: R = p-OMePh	95%
5	3e: R = p-IPh	70/5	5e: R = p-IPh	71%
6	3f: R = ⁱPr	70/20	5f: R = ⁱPr	66%
7	3g	70/30	5g	92%
8	3h	70/45	5h	98%
9	3i	70/60	5i	89%
10	3j	70/30	5j	95%