Table 1.

Solvolysis of ureas in neutral methanol. Bn =benzyl.

Entry	3	R	R′	R″	T [°C]	t [h]	Yield of 4 [%][a]
1	3 a	Ph	Me	Me	70	18	<1
2	3 b	Ph	Et	Et	70	18	<2
3	3 c	Ph	iPr	iPr	70	18	81
4	3 d	Ph	H	tBu	70	18	0
5	3 e	Ph	Me	tBu	70	<5 min	>99
6	3 e	Ph	Me	tBu	50	1	>99
7	3 f	Ph	Et	tBu	50	1	>99
8	3 f	Ph	Et	tBu	20	18	>99
9	3 g	Ph	nPr	tBu	50	1	>99
10	3 g	Ph	nPr	tBu	20	18	>99
11	3 h	Ph	iPr	tBu	20	1	>99
12	3 i	Bn	iPr	iPr	70	18	33
13	3 i	Bn	iPr	iPr	70	72	85
14	3 j	tBu	iPr	iPr	70	18	26
15	3 j	tBu	iPr	iPr	70	72	85
16	3 k	tBu	iPr	tBu	20	1	>99

^[a]Yield of isolated product.