ChemInform Abstract: Synthetic Applications of Bis(iminophosphoranes) - Preparation of Some Derivatives of the 11H-Quinazolino(2,3-b)- and Quinazolino(4,3-b) quinazoline Ring Systems.

ChemInform ◽  
2010 ◽  
Vol 28 (33) ◽  
pp. no-no
Author(s):  
P. MOLINA ◽  
C. CONESA ◽  
M. DE LOS DESAMPARADOS VELASCO
Keyword(s):  
Ring Systems ◽  
Derivatives Of

scholarly journals Antimonial analogues of the acridine series. Dilhydrostibacridines

1933 ◽  
Vol 143 (848) ◽  
pp. 38-47 ◽  
Keyword(s):  
Nitro Derivative ◽  
Starting Material ◽  
Arsenic Compounds ◽  
Ring Systems ◽  
Nitrogen Ring ◽  
Derivatives Of

In pursuing our investigation out the antimony analogues of certain nitrogen ring-systems, we Lave now succeeded in obtaining derivatives of dilhydrostibacridines, of when some of the corresponding arsenic compounds have been studied recently by Gump and Stolzenburg. The starting material for the work was o -aminodiphenylmethane obtained from the corresponding nitro derivative when, in turn, was prepared from o -nitrobenzyl chloride and benzene by Taneseseu's modification of the Friedel-Crafts reaction.

Circular dichroism of benzylidene derivatives of glycerol and mannitol

1977 ◽  
Vol 30 (11) ◽  
pp. 2465 ◽  
Author(s):  
RM Carman ◽  
CJ Hawkins ◽  
JJ Kibby
Keyword(s):  
Circular Dichroism ◽  
Ring Systems ◽  
Cotton Effects ◽  
Derivatives Of ◽  
Circular Dichroïsm

The c.d. spectra are reported for a series of benzylidene derivatives of glycerol and mannitol containing 1,3-dioxolan, 1,3-dioxan and 1,3- dioxepan ring systems. The signs of the Cotton effects of 1Lb and 1La transitions of the phenyl chromophore have been rationalized in terms of recently proposed sector rules for these transitions.

ChemInform Abstract: CONDENSED THIOPHEN RING SYSTEMS PART 16, DERIVATIVES OF 11H-(1)BENZOTHIENO(2,3-B)(1)BENZOTHIOPYRAN

1975 ◽  
Vol 6 (5) ◽  
pp. no-no
Author(s):  
BRIAN IDDON ◽  
HANS SUSCHITZKY ◽  
DAVID S. TAYLOR ◽  
KEVAN E. CHIPPENDALE
Keyword(s):  
Ring Systems ◽  
Derivatives Of

The Meisenheimer Rearrangement in Heterocyclic Synthesis. IV. Derivatives of the 2H,6H-1,5,4-Benzodioxazocine and 7H-1,6,5-Benzodioxazonine Ring Systems: X-Ray Crystal Structure of 10-Methoxy-5-methyl-7-phenyl-2,3,4,5-tetrahydro-7H-1,6,5-benzodioxazonine

1988 ◽  
Vol 41 (3) ◽  
pp. 293 ◽  
Author(s):  
JB Bremner ◽  
EJ Browne ◽  
LM Engelhardt ◽  
IWK Gunawardana ◽  
AH White
Keyword(s):  
Molecular Structure ◽  
Crystal Structure ◽  
Crystal And Molecular Structure ◽  
Ring System ◽  
Heterocyclic Synthesis ◽  
Rearrangement Product ◽  
Ring Systems ◽  
X Ray ◽  
Derivatives Of ◽  
Moderate Yield

Meisenheimer rearrangement of the N-oxides (4) derived from a series of 5-aryl-4-methyl-2,3,4,5-tetrahydro-1,4-benzoxazepines (3) gave rise to eight derivatives (5) of the new 2H,6H-1,5,4-benzodioxazocine ring system. Reaction of 9-methoxy-5-methyl-6-phenyl-3,4,5,6- tetrahydro-2H-1,5-benzoxazocine (6) with 3-chloroperoxybenzoic acid gave an unstable N-oxide (7). A Meisenheimer rearrangement product from (7), 10-methoxy-5-methyl-7-phenyl-2,3,4,5-tetrahydro-7 H-1,6,5- benzodioxazonine (8), the first example of this ring system, was isolated directly in moderate yield on oxidation of (6) with cooling. The crystal and molecular structure of (8) has been determined by X-ray crystallographic methods.

N,N-Dialkyl-N′-Chlorosulfonyl Chloroformamidines in Heterocyclic Synthesis. III. Pyrido- and Pyridazo-Fused [1,2,4,6]Thiatriazine Dioxides

2007 ◽  
Vol 60 (2) ◽  
pp. 105 ◽  
Author(s):  
Teresa Cablewski ◽  
Erin J. Carter ◽  
Craig L. Francis ◽  
Andris J. Liepa ◽  
Michael V. Perkins
Keyword(s):  
Heterocyclic Synthesis ◽  
Ring Systems ◽  
Derivatives Of

N,N-Dialkyl-N′-chlorosulfonylchloroformamidines 1 reacted with 2-aminopyridines 2 to give novel pyrido[1,2-b][1,2,4,6]thiatriazine dioxides 3 and pyrido[2,1-c][1,2,4,6]thiatriazine dioxides 4. Reaction of 1 with 3-aminopyridazines 5 afforded pyridazo[3,2-c][1,2,4,6]thiatriazine dioxides 6 and a pyridazo[2,3-b][1,2,4,6]thiatriazine dioxide 7. The compounds 6 and 7 are derivatives of new ring systems.

Detection of Non-Conjugative Interactions in Rigid Cyclic Molecules by Using Carbon-13 N.M.R. Shift Values

1987 ◽  
Vol 40 (2) ◽  
pp. 249 ◽  
Author(s):  
R Bishop ◽  
GH Lee
Keyword(s):  
Interactive Effects ◽  
Ring Systems ◽  
Cyclic Molecules ◽  
Work Interaction ◽  
Derivatives Of

In previous work, interaction between formally unconjugated unsaturated groups was detected by comparing the 13C n.m.r. shift values of the sp2 atoms of difunctional compounds with those of the corresponding monofunctional compounds. This procedure has now been used to investigate possible interactive effects in a range of rigid alicyclic systems where steric and conformational factors cannot be involved, namely, the 2,6-disubstituted adamantane (6), 4,8-disubstituted 2-thiaadamantane (7), 2,6-disubstituted noradamantane (8), and 2,5-disubstituted norbornane (9) systems. In each case interaction was detected between the unsaturated groups of the non-conjugated dimethylene, methylene ketone, and diketone derivatives of these ring systems. The nature of this effect is under further investigation.

N,N-Dialkyl-N′-Chlorosulfonyl Chloroformamidines in Heterocyclic Synthesis. IV. 3-Dialkylamino-1,1,8-trioxo-1H-1λ6-pyrano[3,4-e][1,4,3]oxathiazines

2007 ◽  
Vol 60 (2) ◽  
pp. 113 ◽  
Author(s):  
Teresa Cablewski ◽  
Craig L. Francis ◽  
Andris J. Liepa
Keyword(s):  
Heterocyclic Synthesis ◽  
Ring Systems ◽  
Derivatives Of

N,N-dialkyl-N′-chlorosulfonylchloroformamidines 1 reacted regioselectively with 4-hydroxy-2-pyrone derivatives 2 to give 3-dialkylamino-1,1,8-trioxo-1H-1λ6-pyrano[3,4-e][1,4,3]oxathiazines 3. Dichloride 1b reacted regioselectively with 1,3-dimethylbarbituric acid 10 to give 3-diethylamino-5,7-dimethyl-1,1,6,8-tetraoxo-1H-1λ6-pyrimido[5,4-e][1,4,3]oxathiazine 11. The compounds 3 and 11 are derivatives of new ring systems.

Sign in / Sign up

Export Citation Format

Share Document