- Aerobic Dehydrogenation of N-Heterocycles with Grubbs Catalyst: Its Application to Assisted-Tandem Catalysis to Construct N-Containing Fused Heteroarenes
-
An aerobic dehydrogenation of nitrogen-containing heterocycles catalyzed by Grubbs catalyst is developed. The reaction is applicable to various nitrogen-containing heterocycles. The exceptionally high functional group compatibility of this method was confirmed by the oxidation of an unprotected dihydroindolactam V to indolactam V. Furthermore, by taking advantage of the oxygen-mediated structural change of the Grubbs catalyst, we integrated ring-closing metathesis and subsequent aerobic dehydrogenation to develop the novel assisted-tandem catalysis using molecular oxygen as a chemical trigger. The utility of the assisted-tandem catalysis was demonstrated by the concise synthesis of N-containing fused heteroarenes including a natural antibiotic, pyocyanine.
- Kawauchi, Daichi,Noda, Kenta,Komatsu, Yoshiyuki,Yoshida, Kei,Ueda, Hirofumi,Tokuyama, Hidetoshi
-
supporting information
p. 15793 - 15798
(2020/10/12)
-
- FUSED THIAZOLOPYRIMIDINE DERIVATIVES AS MNKS INHIBITORS
-
The present invention relates to compounds of formulae I and H, or pharmaceutically acceptable salts or esters thereof. Further aspects of the invention relate to pharmaceutical compositions and therapeutic uses of said compounds in the treatment of diseases of uncontrolled cell growth, proliferation and/or survival, inappropriate cellular immune responses, inappropriate cellular inflammatory responses, or neurodegenerative disorders, preferably tauopathies, even more preferably, Alzheimer's disease.
- -
-
-
- Structure-activity relationship study of a series of novel oxazolidinone derivatives as IL-6 signaling blockers
-
A series of oxazolidinone and indole derivatives were synthesized and evaluated as IL-6 signaling blockers by measuring the effects of these compounds on IL-6-induced luciferase expression in human hepatocarcinoma HepG2 cells transfected with p-STAT3-Luc. Among different compounds screened, compound 4d was emerged as the most potent IL-6 signaling blockers with IC50 value of 5.9 μM which was much better than (+)-Madindoline A (IC50 = 21 μM), a known inhibitor of IL-6.
- Singh, Sarbjit,Gajulapati, Veeraswamy,Gajulapati, Kondaji,Goo, Ja-Il,Park, Yeon-Hwa,Jung, Hwa Young,Lee, Sung Yoon,Choi, Jung Ho,Kim, Young Kook,Lee, Kyeong,Heo, Tae-Hwe,Choi, Yongseok
-
supporting information
p. 1282 - 1286
(2016/02/23)
-
- Metal-free N-arylation of indolines with diaryliodonium salts
-
The N-arylation of indolines using diaryliodonium salts as electrophilic arylating reagents is described. Without the use of any additional additives, the desired N-aryl indolines could be obtained in up to 85% yield.
- Riedmüller, Stefan,Nachtsheim, Boris J.
-
supporting information
p. 651 - 655
(2015/03/14)
-
- NOVEL 2,3-DIHYDROINDOLE COMPOUNDS
-
The invention relates to compounds of the formula I wherein the variables are as defined in the claims. The compounds are useful in the treatment of a disease where a D4 receptor and/or a 5-HT 2A receptor is implicated.
- -
-
Page/Page column 10
(2008/06/13)
-
- NOVEL 2,3-DIHYDROINDOLE COMPOUNDS
-
The invention relates to compounds of the formula I, wherein the variables are as defined in the claims. The compounds are useful in the treatment of a disease where a D4 receptor and/or a 5-HT2A receptor is implicated.
- -
-
Page/Page column 27
(2010/11/26)
-
- Determination of the absolute stereochemistry and asymmetric total synthesis of madindolines A and B: A practical improvement to a second-generation approach from the first-generation
-
In this report, we describe an efficient, highly convergent, stereocontrolled first total synthesis and a second-generation synthesis of madindolines A 1 and B 2, potent selective inhibitors of interleukin 6. The key steps include (1) asymmetric oxidative ring-closure reaction of tryptophol 3 to construct a chiral 3a-hydroxyfuroindoline 4 using the modified Sharpless asymmetric epoxidation condition, (2) highly diastereoselective acylation to build up the quaternary carbon center, and (3) intramolecular acylation of ester 32 with allylsilanes to produce the full substituted cyclopentenedione units. Our first synthetic route defines for the first time both their relative and absolute configurations. Moreover, a more efficient second-generation synthesis was designed, which is suitable for gram-scale preparation of these compounds.
- Hirose, Tomoyasu,Sunazuka, Toshiaki,Yamamoto, Daisuke,Kojima, Naoto,Shirahata, Tatsuya,Harigaya, Yoshihiro,Kuwajima, Isao,Omura, Satoshi
-
p. 6015 - 6039
(2007/10/03)
-
- Indane or dihydroindole derivatives
-
The present invention relates to substituted indane or dihydroindole compounds of Formula (I) wherein A is an indole. These compounds have high affinity for D4receptors.
- -
-
Page column 28-29
(2010/02/05)
-
- A novel series of thromboxane A2 synthetase inhibitors with free radical scavenging and anti-peroxidative activities
-
A novel series of indoline derivatives with imidazole and carboxyl moieties were synthesized and evaluated for their thromboxane A2 (TXA2) synthetase inhibiting, radical scavenging and anti-peroxidative activities. Among the compounds synthesized, 3.{5-substituted-3-[2-(imidazol-1-yl)ethyl]indolin-1-yl}propionic acids showed free radical scavenging activity and inhibitory effects on lipid-peroxidation of rat brain homogenate and on arachidonate-induced TXA2-dependent aggregation of rabbit platelets. The anti-platelet and anti-peroxidative activities were related to the lipophilicity of the 5-substituent. The 5-hexyloxy derivative (13) showed about 35-fold higher inhibitory activity on TXA2 synthesis than that of ozagrel and about 100-fold higher activity on lipid peroxidation than that of α-tocopherol. Compound 13 showed in vivo anti-thrombotic effect in mice and ex vivo anti-peroxidative activity in rats.
- Kamiya,Shirahase,Nakamura,Kanda,Matsui,Yoshimi,Kasai,Takahashi,Kurahashi
-
p. 563 - 571
(2007/10/03)
-