ChemInform Abstract: NEW COMPOUNDS: REISSERT COMPOUND STUDIES. XXXII: FACILE SYNTHESIS OF 3-AZAPAPAVERINE

1980 ◽  
Vol 11 (22) ◽  
Author(s):  
D. BHATTACHARJEE ◽  
F. D. POPP
Keyword(s):  
Facile Synthesis ◽  
New Compounds

Fused thia-heterocycles via isothiocyanates. Part I. Facile synthesis of some new 1-benzothiopyran- 4-one derivatives

2017 ◽  
Vol 72 (5) ◽  
pp. 369-375 ◽  
Author(s):  
Lina M. Barhoumi ◽  
Mustafa M. El-Abadelah ◽  
Salim S. Sabri ◽  
Wolfgang Voelter
Keyword(s):  
Facile Synthesis ◽  
One Pot ◽  
New Compounds

AbstractA selected set of new 4H-benzothiopyran-4-one derivatives 6a–h has been prepared by a one-pot reaction involving deprotonated methyl 3-oxo-3(2′,4′,5′-trichlorophenyl)propanoate 5 and the appropriate aryl or alkyl isothiocyanate. 2,4,5-Trichloroacetophenone 4, required for the synthesis of 5, is successfully prepared by Friedel–Craft’s acetylation of 1,2,4-trichlorobenzene in 82% yield. The structures of the new compounds 5 and 6a–h are based on microanalytical and spectral (NMR, MS(EI), and HRMS) data.

Fused thia-heterocycles via isothiocyanates. Part II. A convenient synthesis of some new thieno[2,3-b]thiopyran-4-one derivatives

2018 ◽  
Vol 73 (2) ◽  
pp. 109-113 ◽  
Author(s):  
Lana Z. El-Agha ◽  
Mustafa M. El-Abadelah ◽  
Marwan R. Kamal ◽  
Salim S. Sabri ◽  
Randa M. Al-As’ad ◽  
...  
Keyword(s):  
Electron Impact ◽  
Ester Group ◽  
Carboxyl Group ◽  
Direct Reaction ◽  
Facile Synthesis ◽  
Anhydrous Tetrahydrofuran ◽  
Convenient Synthesis ◽  
New Compounds ◽  
Group Structures ◽  
Aryl Isothiocyanates

AbstractA facile synthesis of some methyl 5-(arylamino)-4-oxothieno[2,3-b]thiopyran-6-carboxylates 6a–g is achieved via direct reaction of deprotonated methyl 3-(2,5-dichlorothien-3-yl)-3-oxopropanoate with aryl isothiocyanates in anhydrous tetrahydrofuran (THF) under reflux. Upon saponification of 6a,b, the ester group is eliminated, most logically via decarboxylation of the presumably-formed carboxyl group. Structures of the new compounds 6a–g and 7a,b are supported by microanalytical and spectral [NMR, MS electron impact (EI) and HRMS] data.

Crystal chemistry of high-Tc superconductors

1990 ◽  
Vol 48 (4) ◽  
pp. 1118-1119
Author(s):  
Maryvonne Hervieu
Keyword(s):  
Oxygen Deficiency ◽  
Large Family ◽  
Copper Oxides ◽  
High Tc Superconductors ◽  
High Tc ◽  
Single Mechanism ◽  
Square Planar ◽  
History Of ◽  
Bismuth Cuprates ◽  
New Compounds

Four years after the discovery of superconductivity at high temperature in the Ba-La-Cu-O system, more than thirty new compounds have been synthesized, which can be classified in six series of copper oxides: La2CuO4 - type oxides, bismuth cuprates, YBa2Cu3O7 family, thallium cuprates, lead cuprates and Nd2CuO4 - type oxides. Despite their quite different specific natures, close relationships allow their structures to be simply described through a single mechanism. The fifth first families can indeed be described as intergrowths of multiple oxygen deficient perovskite slabs with multiple rock salt-type slabs, according to the representation [ACuO3-x]m [AO]n.The n and m values are integer in the parent structures, n varying from 0 to 3 and m from 1 to 4; every member of this large family can thus be symbolized by [m,n]. The oxygen deficient character of the perovskite slabs involves the existence or the co-existence of several types of copper environment: octahedral, pyramidal and square planar.Both mechanisms, oxygen deficiency and intergrowth, are well known to give rise easily to nonstoichiometry phenomena. Numerous and various phenomena have actually been characterized in these cuprates, strongly depending on the thermal history of the samples.

Evaluation of New Compounds for Opioid Activity: Annual Report (1993)

1994 ◽  
Author(s):  
J. C. Woods ◽  
◽  
C. P. France ◽  
F. Medzihradsky ◽  
C. B. Smith ◽  
...  
Keyword(s):  
Annual Report ◽  
Opioid Activity ◽  
New Compounds

Biotemplated facile synthesis of three‐dimensional micro/nanoporous tin oxide: improving the flammable and mechanical properties of flexible PVC

2019 ◽  
Vol 14 (8) ◽  
pp. 828-830 ◽  
Author(s):  
Weihua Meng ◽  
Weihong Wu ◽  
Weiwei Zhang ◽  
Luyao Cheng ◽  
Yunhong Jiao ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tin Oxide ◽  
Three Dimensional ◽  
Facile Synthesis

Selective Degradation of Grindelic Acid and Its 3α-Hydroxy Analog: Facile Synthesis of Grindelistrictic Acids and Potential Intermediates for Erigerol

Synlett ◽  
1991 ◽  
Vol 1991 (09) ◽  
pp. 725-727 ◽  
Author(s):  
Takeshi Shimizu ◽  
Sayoko Hiranuma ◽  
Zhao-hui Qian ◽  
Hirosuke Yoshioka
Keyword(s):  
Facile Synthesis ◽  
Selective Degradation
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