Results 141 to 150 of about 433,597 (216)

ChemInform Abstract: STUDIES ON 1,3‐BENZOXAZINES. IV. REACTION OF IMIDOYL CHLORIDES OF 1,3‐BENZOXAZINES WITH SULFOXIDES

Chemischer Informationsdienst, 1981
AbstractDas Chlorbenzoxazin (I) reagiert bei Raumtemperatur mit Dimethylsulfoxid zu einem Gemisch der Verbindungen (II)‐(IV).
R. TACHIKAWA, K. WACHI, A. TERADA
openaire   +1 more source

Visible Light-Induced Oxidative Cross Dehydrogenative Coupling of Glycine Esters with β-Naphthols: Access to 1,3-Benzoxazines.

Journal of Organic Chemistry, 2020
A direct aerobic oxidative dehydrogenative coupling reaction of glycine esters with β-naphthols has been achieved via the synergistic combination of photoredox catalysis and Lewis acid catalysis.
Y. Zhang, Shilin Li, Yin Zhu, Xiaorong Yang, Huang Zhou, Ying Li   +5 more
semanticscholar   +1 more source

Pharmacological properties of some derivatives of 1,3-benzoxazine

Experientia, 1968
Sono stati studiati 22 derivati della 1,3-benzossazina, 8 dei quali sono risultati attivi sulla depressione da reserpina. Tra essi il piu efficace e stato il 4H-3-carbossamidometil-1,3-benzossazin-2-one. Correlando la struttura chimica all'attivita farmacologica si e visto che la distanza del gruppo amidico dall'anello benzossazinico, la linearita ...
L, Bernardi, S, Coda, L, Pegrassi, G K, Suchowsky   +3 more
openaire   +2 more sources

ChemInform Abstract: SYNTHESIS OF 4H‐1,3‐BENZOXAZIN‐4‐ONIUM SALTS AND OF 4H‐1,3‐BENZOXAZINE‐4‐ONES

Chemischer Informationsdienst, 1975
AbstractDie Salicylamide (I) cyclisieren mit den Carbonsäureanhydriden (II) in Gegenwart von 70%iger Perchlorsäure zu Benzoxazinoniumsalzen (III), die mit Triäthylamin die Benzoxazinone (IV) ergeben und mit Wasser zu den N‐Acylsalicylamiden (V) hydrolysieren.
YU. I. RYABUKHIN, V. V. MEZHERITSKII, G. N. DOROFEENKO   +2 more
openaire   +1 more source

Synthesis of substituted 1,3-benzoxazin-4-ones

Chemistry of Heterocyclic Compounds, 1983
The heterocyclization of 2-hydroxybenzoic acid anilides with acetylene in the presence of a catalyzing mixture of potassium hydroxide with cadmium oxide or cadmium acetate alone gives o-, m-, and p-vinyloxy-substituted 1,3-benzoxazin-4-ones.
G. G. Skvortsova, Z. V. Stepanova, L. V. Andriyankova, V. K. Voronov   +3 more
openaire   +1 more source

Electrochemical Synthesis of 2-Amino-1,3-benzoxazines via TBAI-mediated Desulfurative Cyclization of Isothiocyanates and 2-Aminobenzyl Alcohols.

Journal of Organic Chemistry
An efficient one-step protocol has been developed to access a variety of 2-amino-1,3-benzoxazine derivatives via tetrabutylammonium iodide-mediated electrochemical desulfurative cyclization of isothiocyanates and 2-aminobenzyl alcohols.
Fengkai Sun, Man Miao, Yu Huang, Xiuli Wu, Wenxue Li, Xiaobing Lan, Jiang-Qiang Yu, Jian Zhang, Zhenyu An   +8 more
semanticscholar   +1 more source

Polyaddition of bifunctional 1,3‐benzoxazine and 2‐methylresorcinol

Journal of Polymer Science Part A: Polymer Chemistry, 2013
ABSTRACT:A polyaddition system consisted of a bifunctional N‐n‐propyl benzoxazine and 2‐methylresorcinol (MR) that proceeds at ambient temperature has been developed. In this system, the aromatic ring of MR acted as a bifunctional monomer, reacting with a two equivalent amount of benzoxazine moieties via their ring‐opening reaction.
Hiroaki Oie, Atsushi Mori, Atsushi Sudo, Takeshi Endo   +3 more
openaire   +1 more source

A One‐Pot Synthesis of 1,3‐Benzoxazines.

ChemInform, 2004
AbstractFor Abstract see ChemInform Abstract in Full Text.
openaire   +1 more source

Electrochemical Cyclization-Desulfurization Approach for the Synthesis of 1,3-Benzoxazines Using Cascade C-O and C-N Bond Formation.

Journal of Organic Chemistry
A cost-effective, eco-friendly, and highly efficient one-pot electrochemical process has been described for the synthesis of 4H-1,3-benzoxazine and 4,5-dihydro-1,3-benzoxazepine derivatives by employing 2-aminobenzyl alcohols, 2-(2-aminophenyl)ethan-1-ol,
Kamal Kant, Priyadarshini Naik, Chandresh K. Patel, T. A. Devi, Jyoti, Arup K. Kabi, F. A. Al‐Misned, Virender Singh, C. Malakar   +8 more
semanticscholar   +1 more source

Chemodivergent Synthesis of 1,3-Benzoxazines, Indolin-3-ols, and Indoles from the Designer Amides: Applications to the Synthesis of Phenanthridine Natural Products.

Journal of Organic Chemistry
A chemodivergent synthesis of 1,3-benzoxazines, indolin-3-ols, and indoles has been conceptualized from readily accessible 2-bromoacetylphenyl benzamides.
W. I. Lone, Gowhar Ahmad Rather, Bilal A. Bhat, Showkat Rashid   +3 more
semanticscholar   +1 more source