申请人:LAUGHLIN Scott
公开号:US20220218661A1
公开(公告)日:2022-07-14
The present invention provides a compound having the structure:
wherein
R
1
is H or a protecting group;
R
2
and R
3
are each independently H, halo, C
1
-C
6
alkyl, C
2
-C
6
alkenyl, C
2
-C
6
alkynyl, C
1
-C
6
alkyl-C(O)NHR
6
, C
1
-C
6
alkyl-C(O)OR
6
,
wherein R
6
is H, C
1
-C
6
alkyl, C
2
-C
6
alkenyl or C
2
-C
6
alkynyl,
or R
2
and R
3
combine to form a 3-7 membered cycloalkyl, heterocycloalkyl, aryl or heteroaryl ring; and
R
4
and R
5
are each independently halo.