Convenient Synthesis of 1,4-Dihydro-2H-3,1-benzoxazin-2-ones by Iodocyclization of t-Butyl 2-Vinylphenylcarbamate
摘要:
It has been found that t-butyl 2-vinylphenylcarbamate derivatives underwent iodocyclization on treatment with iodine in the presence of sodium hydrogencarbonate to afford 4-iodomethyl-1,4-dihydro-2H-3,1-benzoxazin-2-one derivatives in generally good yields. The reduction of these 4-iodomethyl derivatives with tributyltin hydride gave the corresponding 4-methyl derivatives in good yields.
6-Amino-1,4-dihydro-benzo[d][1,3] oxazin-2-ones and analogs useful as progesterone receptor modulators
申请人:Zhang Puwen
公开号:US20050085470A1
公开(公告)日:2005-04-21
Compounds having the structure of formula I are provided. In formula I, R
1
is H, OH, substituted or unsubstituted C
1
to C
3
alkyl, C
1
to C
3
perfluoroalkyl, or COR
6
; R
6
is H, substituted or unsubstituted C
1
to C
4
alkyl, aryl, substituted or unsubstituted C
1
to C
4
alkoxy, substituted or unsubstituted C
1
to C
3
aminoalkyl; R
2
and R
3
are H, substituted or unsubstituted C
1
to C
6
alkyl, C
1
to C
6
perfluoroalkyl, substituted or unsubstituted C
2
to C
6
alkenyl, substituted or unsubstituted C
2
to C
6
alkynyl, substituted or unsubstituted C
3
to C
6
cycloalkyl, substituted or unsubstituted aryl, or substituted or unsubstituted heterocyclic; or R
2
and R
3
are fused to form spirocyclic rings; R
4
is NHR
7
, OR
7
, NHSO
2
R
7
, or OSO
2
R
7
; Q is O, S, NR
8
, or CR
9
R
10
; or a pharmaceutically acceptable salt, ester, or prodrug thereof. Such compounds are useful as progesterone receptor modulators and for treating progesterone receptor related conditions.
sec-butyllithium. Quenching with a range of electrophiles yields functionalised aryl ureas in excellent yield. Lateral lithiation is favoured when the urea nitrogen adjacent to the aromatic ring in question is alkylated, and when competitive lithiations of such a ring are possible, lateral lithiation is more favourable than the alternative ortholithiation.
6-Amino-1,4-dihydro-benzo[d][1,3]oxazin-2-ones and analogs useful as progesterone receptor modulators
申请人:Zhang Puwen
公开号:US20070225281A1
公开(公告)日:2007-09-27
Compounds having the structure of formula I are provided. In formula I, R
1
is H, OH, substituted or unsubstituted C
1
to C
3
alkyl, C
1
to C
3
perfluoroalkyl, or COR
6
; R
6
is H, substituted or unsubstituted C
1
to C
4
alkyl, aryl, substituted or unsubstituted C
1
to C
4
alkoxy, substituted or unsubstituted C
1
to C
3
aminoalkyl; R
2
and R
3
are H, substituted or unsubstituted C
1
to C
6
alkyl, C
1
to C
6
perfluoroalkyl, substituted or unsubstituted C
2
to C
6
alkenyl, substituted or unsubstituted C
2
to C
6
alkynyl, substituted or unsubstituted C
3
to C
6
cycloalkyl, substituted or unsubstituted aryl, or substituted or unsubstituted heterocyclic; or R
2
and R
3
are fused to form spirocyclic rings; R
4
is NHR
7
, OR
7
, NHSO
2
R
7
, or OSO
2
R
7
; Q is O, S, NR
8
, or CR
9
R
10
; or a pharmaceutically acceptable salt, ester, or prodrug thereof. Such compounds are useful as progesterone receptor modulators and for treating progesterone receptor related conditions.