Table 2.

In situ NMR monitoring data

Entry	Acid4	Conversion4[%]	Max yield5[%]	tmax5[min]	Max yield7[%]	tmax7[min]
1	a	88	7	420	>1	540
2	b	100	47	180	3	240
3	c	100	46	540	3	540
4	d	100	59	240	3	300
5	e	100	94[a]	180	3	240
6	f	98	54[b]	240	1	240
7	g	99	98	240	3	240
8	h	5	–	240	–	240
9	i	98	41	180	4	240
10	j	80	39	420	2	540
11	k	41	18	540	>1	540
12	l	97	96	90	3	120

[a] Combined yield of 7-methoxy (76 %) and 9-methoxy (18 %) regioisomers. [b] Yield of 5 a (loss of MeO).