Table 1.
entry | diene | dienophile | product (yield)a |
1 |
(93%) |
||
2 | 19 |
(51%) |
|
3 |
(88%) |
||
4 | 20 |
(50%) |
|
5 |
(81%) |
||
6 | 21 |
(78%) |
|
7 |
(77%) |
||
8 | 22 |
(48%) |
|
9 |
(56%) |
aIsolated yield and dr > 25:1 in all cases.
entry | diene | dienophile | product (yield)a |
1 |
(93%) |
||
2 | 19 |
(51%) |
|
3 |
(88%) |
||
4 | 20 |
(50%) |
|
5 |
(81%) |
||
6 | 21 |
(78%) |
|
7 |
(77%) |
||
8 | 22 |
(48%) |
|
9 |
(56%) |
aIsolated yield and dr > 25:1 in all cases.