Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

2H-1 Benzopyran

Chemical Name [ (3-(2-(Diethylamino)ethy ] -4-methyl-2-oxo-2H-1 -benzopyran-7-yl] oxy) acetic acid ethyl ester hydrochloride... [Pg.336]

Chemical Name 4-Hydroxy-a-(4-hydroxy-2-oxo-2H-1-benzopyran-3-yl)-2-oxo-2H-1-benzo-pyran-3-acetic acid ethyl ester... [Pg.596]

Chemical Name N-[7 [[3-0-(aminocarbonyl)-5,5 di-C-methyl-4-0-methyl-a-L-lyxo-pyranosylj oxyj -4-hydroxy-8-methyl-2-oxo-2H-1 -benzopyran-3-yl] -4-hydroxy-3-(3-methyl-2-butenyl)benzamide... [Pg.1102]

All these 3,4-dihydro-2H-1 -benzopyran-2-ones 17 and 18 are substrates of class A and class C (3-lactamases. They are thus the first 8-lactones that are hydrolyzed by [3-lactamases. The kcat values for these substrates are generally smaller than those of the analogous acyclic phenaceturates suggesting that the tethered leaving group obstructs the attack of water on the acyl-enzyme. Despite the apparent advantage of the long-lived acyl-enzymes, the irreversible inhibition by the functionalized compounds is no better than that of acyclic molecules 16. Thus, even the tethered QM cannot efficiently trap a second nucleophile at the [3-lactamase active site, at least as placed as dictated by the structure of compounds 18.70... [Pg.374]

Doucet, C. Pochet, L. Thierry, N. Pirotte, B. Delarge, J. Reboud-Ravaux, M. 6-Substituted 2-OXO-2H-1 -benzopyran-3-carboxyI ic acid as a core structure for specific inhibitors of human leukocyte elastase. J. Med. Chem. 1999, 42, 4161—4171. [Pg.379]

Photoinduced, spontaneous aggregation processes have been shown to occur when indolinobenzopyrans are irradiated in aliphatic solvents. The aggregates which are globular in appearance, consist of submicron cores of crystalline materials with an amorphous exterior and are termed "quasicrystals" (L-3). Spectroscopic studies by Krongauz and coworkers (1) indicate that the composition of the cores are AnB (n=2,3) and the amorphous exteriors AB. The most stable quasicrystals have been derived from 1-(/ -metha-crolyloxyethyl)-3,3 dimethyl-61-nitrospiro- (indoline-2,2 —[2H-1 ] benzopyran (SP-A) and its associated merocyanine form (SP-B). [Pg.135]

Autonomous underwater vehicle Improvised Munitions Black Book Vol. 1 l/,3-Dihydro-l/-(2-carboxyethyl)-3,3-dimethyl-6-nitrospiro [2H-1 -benzopyran-2,2/-(2H)-indoline]... [Pg.326]

All of the compounds discussed are based on three molecules 2/f-pyran (1), 4//-pyran (2) and the pyrylium cation (3). Names which have been used for the benzologue (4) of 2//-pyran include 2H- 1-benzopyran, benzo-a-pyran, chrom-3-ene and 2//-chromene. A similar situation exists for the corresponding derivative (5) of 4/f-pyran. The unambiguous and simplest name chromene is used in the present work. The benzologue (6) of pyrylium is known both as benzopyrylium and chromylium the former name is preferred here. Higher benzologues are referred to as naphthopyrans, such as 2H-naphtho[ 1,2-6 jpyran (7), but the names xanthene and xanthylium are used for (8) and (9). [Pg.574]

The simple pyrans are rather unstable compounds and of little biological or industrial significance but some of their benzo derivatives are of considerable interest. Many 2H-1-benzopyrans (chromenes) are found in plants, for example evodionol (126), lapachenole (127), lonchocarpin (128), rottlerine (129) and edulan (130). A few of the constituents of marijuana (hashish) belong to this class, for example cannabinol (131). [Pg.665]

H-1 -benzopyrans in, 3, 665 biosynthesis, 3, 877 Mass spectrometry in biosynthesis methodology, 1, 86 heterocyclic compounds reviews, 1, 77... [Pg.701]

THE SYNTHESIS OF ENOL ETHERS BY METHYLENATION OF ESTER 1-PHENOXY-1-PHENYLETHENE AND 3.4-DIHYDRO-2-METHYLENE-2H-1-BENZOPYRAN... [Pg.72]

Ether, phenyl 1-phenylvinyl and 2H-1-Benzopyran, 3,4-dihydro-2-methylene-)... [Pg.72]

Phenoxy-1 -phenylethene Ether, phenyl 1-phenylvinyl (8,9) (19928-57-5) 3,4-Dihydro-2-methylene-2H-1 -benzopyran 2H-1-Benzopyran, 3,4-dihydro-2-methylene- (10) (74104-13-5)... [Pg.79]

Phenyl benzoate Benzoic acid, phenyl ester (8,9) (93-99-2) Dihydrocoumarin 2H-1-Benzopyran-2-one, 3,4-dihydro- (9) (119-84-6)... [Pg.79]

H-1-BENZOPYRAN, 3.4-DIHYDRO-2-METHYLENE (74104-13-5), 69, 72 2H-1-BENZOPYRAN-3-CARBOXYLIC ACID, 5,6,7,8-TETRAHYDRO-2-OXO-,... [Pg.260]

Dale L. Boger and Michael D. Mullican 98 PREPARATION AND INVERSE ELECTRON DEMAND DIELS-ALDER REACTION OF AN ELECTRON-DEFICIENT DIENE METHYL 2-0X0-5,6,7.8-TETRAHYDR0-2H-1-BENZOPYRAN-3-CARBOXYLATE... [Pg.147]

Nl - ACETIC ACID. BISI4-HYDROXY-2-OXO-2H-1-BENZOPYRAN-3-YL)-, ETHYL ESTER... [Pg.50]

DIETHYL-7-METHOXY-3-PHENYL-2H-1-BENZOPYRAN-6-YLIPHEN-0XY1ETHYL)-, HYDROCHLORIDE RN - 57897-56-2... [Pg.188]

N1 - PYRROLIDINE, 1- ( 2- (9- ( 2,2-DIMETHYL-3-PHENYL-2H-1-BENZOPYRAN-9-YLIPHENOXY )ETHYL- HYDROCHLORIDE... [Pg.189]

H-1-BENZOPYRAN-3-CARBOXYLIC ACID, 8-(3 (HYDROXYMERCURI)-2-METHOXYPROPYL)-2-0X0-. SODIUM SALT, compd. with THEOPHYLLINE (1 1)... [Pg.227]

JM Evans, CS Fake, TC Hamilton, RH Poyser, EA Watts. Synthesis and antihypertensive activity of substituted trans-4-ami no-3,4-di hydro-2,2-dimethy 1-2H-1-benzopyran-3-ols. J Med Chem 26 1582-1589, 1983. [Pg.173]

Phenyl-2H-1 -benzopyran) (3-Pheny I-2H-1 -benzopyran) (2-Phenyl-1 -benzopyrylium)... [Pg.339]

See other pages where 2H-1 Benzopyran is mentioned: [Pg.1381]    [Pg.1409]    [Pg.1448]    [Pg.431]    [Pg.9]    [Pg.233]    [Pg.34]    [Pg.574]    [Pg.739]    [Pg.76]    [Pg.351]    [Pg.72]    [Pg.212]    [Pg.213]    [Pg.163]    [Pg.338]    [Pg.339]    [Pg.419]    [Pg.420]    [Pg.431]    [Pg.507]    [Pg.1620]   
See also in sourсe #XX -- [ Pg.4 , Pg.11 , Pg.112 , Pg.132 , Pg.133 , Pg.134 ]



SEARCH



2H- Benzopyrans

2H- Benzopyrans

2H-l-Benzopyran-2-one,

4-hydroxy-2H-l-benzopyran-2-one

Benzopyran

Benzopyrane

© 2024 chempedia.info