TIME TEMPERATURE INDICATOR COMPRISING INDOLENIN BASED SPIROPYRANS CONTAINING A N-ACETYLAMIDO OR N-ACETYLESTER SIDE CHAIN
申请人:Feiler Leonhard
公开号:US20110139059A1
公开(公告)日:2011-06-16
The present invention relates to time-temperature indicator (TTI) systems comprising indolenin based spiropyrans containing a N-acetylamido or N-acetylester side chain, especially to a time temperature indicator comprising at least one spiropyran indicator of formula (I) Wherein R
1
is hydrogen, —C
1
-C
18
alkoxy, —C
1
-C
18
alkylthio, —C
1
-C
18
alkyl-SO—, —C
1
-C
18
alkyl-SO
2
—, phenylthio, phenyl, halogen, —C
1
-C
18
alkylthio, —C
1
-C
18
alkyl-SO—, —C
1
-C
18
alkyl-SO
2
—, phenylthio, phenyl, halogen, —C
1
-C
18
alkyl or —NO
2
; R
2
is hydrogen or —C
1
-C
18
alkoxy; R
3
is NO
2
or halogen; R
4
is hydrogen, —C
1
-C
18
alkoxy or halogen; R
5
is hydrogen, halogen, —C
1
-C
18
alkoxy, —COOH, —COO—C
1
-C
18
alkyl, —CF
3
or phenyl; R
6
is hydrogen or R
6
and R
7
form together a phenyl ring; R
7
is hydrogen; R
a
is hydrogen or —C
1
-C
6
alkyl; R
b
is hydrogen or —C
1
-C
6
alkyl, or together with R
a
form a 5-6 membered ring; Y is —CH
2
—COO—R
8
or —CH
2
—CO—N(R
10
)—R
9
; or CH
2
—CO—N(R
10
)-L-N(R
10
) CO—CH
2
— or Y is —CH
2
—CO—O-L′-O—CO—CH
2
— wherein R
8
is hydrogen, C
3
-C
18
alkyl or R
8
is ethyl with the proviso that R
6
and R
7
form together a phenyl ring; R
9
is phenyl, mesityl, phenyl-O-phenyl, phenyl-S-phenyl, phenyl once or more than once substituted by halogen, —CF
3
, C
1
-C
6
alkyl, —C
1
-C
6
alkoxy, carboxy, —COO—C
1
-C
6
alkyl whereby in case of a more than once substitution, the substituent can be the same or different; R
10
is hydrogen, C
1
-C
18
alkyl; L is 1,3 phenylene or 1,4 phenylene wherein the phenylene linker is optionally substituted by once or more than once by halogen, —CF
3
, C
1
-C
18
alkoxy, carboxy, —COO—C
1
-C
18
alkyl, —CONH2, —CON(C
1
-C
18
alkyl)
2
, nitro; or L is naphthalene, biphenylene or phenylene-O-phenylene wherein the naphthalene, biphenylene or phenylene-O-phenylene linker is optionally substituted once or more than once by halogen, —CF
3
, C
1
-C
18
alkyl, —C
1
-C
18
alkoxy, carboxy, —COO—C
1
-C
18
alkyl, —CONH
2
, —CON(C
1
-C
18
alkyl)
2
, nitro; L′ is 1,3 phenylene