S.No |
Entry |
R1 |
R2 |
R3 |
R4 |
R5 |
4Yield(%)a |
1 |
4a (JBIR) |
H |
OMe |
OH |
H |
H |
88 |
2 |
4b |
H |
OMe |
H |
H |
H |
90 |
3 |
4c |
OMe |
H |
H |
H |
H |
90 |
4 |
4d |
H |
H |
OMe |
H |
H |
90 |
5 |
4e |
H |
OMe |
OMe |
H |
H |
89 |
6 |
4f |
OMe |
OMe |
OMe |
H |
H |
88 |
7 |
4g |
H |
OMe |
OMe |
OMe |
H |
87 |
8 |
4h |
H |
OCH2O |
H |
H |
86 |
9 |
4i |
Cl |
H |
H |
H |
H |
85 |
aIsolated yields |