用乙醇中的H 2 O 2 / KOH或丙酮中的Na 2 CO 3 / H 2 O 2处理后,环亚烷基-α-(4-芳基噻唑-2-基)乙腈提供2-(4-芳基噻唑-2-基) )-1-氧杂螺[2.5]辛烷-2-羧酰胺和2-(4-芳基噻唑-2-基)-1-氧杂螺[2.4]庚烷-2-羧酰胺,收率极高(76-100%)。J.杂环化学.2011。
SYNTHESIS OF FUSED AND SPIRO HETEROCYCLIC COMPOUNDS DERIVED FROM 3,5-PYRAZOLIDINEDIONE DERIVATIVES
作者:A. Khodairy
DOI:10.1080/10426500008043678
日期:2000.5.1
Abstract The reaction of compound 1 with triethyl orthoformate afforded 2, which in turn reacted with CS2 and active methlyene compounds or malononitrile to give dithiolane and 4-malononitrile methylene derivatives 3,4, respectively. Treatment of compound 4 with active methylene compounds afforded spiro cyclopentene derivatives 5a-c. Compound 1 was reacted with bromomalononitrile or CS2 and halocompounds
ethyl benzoylacetate and m-cresol using a microwave in the absence of solvents. Phenylpropane-1,3-dione derivative 3 was used as the key synthetic intermediate for the synthesis of many derivatives in this study. A new pyrazole 12, pyrimidine 15, thiophene 37, 4H-pyrane 51 and pyridine derivatives 8, 28, 34, 41 and 46 were synthesized through different chemical reactions. The structures of the newly
2-Cyano-3-(dimethylamino)prop-2-ene Thioamide: A New Reagent for Synthesis of Functionalized 4-Unsubstituted Ethyl Nicotinates and Nicotinonitriles
作者:I. V. Dyachenko
DOI:10.1134/s1070363219050062
日期:2019.5
Condensation of cyclopent(hex)ylidenecyanothioacetamide with N, N-dimethylformamidedimethylacetal led to the formation of a new reagent for organic synthesis: 2-cyano-3-(dimethylamino)prop-2-ene thioamide. On its basis a series of ethyl nicotinates and nicotinonitriles were synthesized by a vinyl substitution reaction.
A NEW CLASS OF BIHETEROCYCLIC THIOGLYCOSIDES FROM PYRIDINE-2-(1<i>H</i>)-THIONES
作者:Galal H. Elgemeie、Mona A. Ahmed
DOI:10.1081/ncn-120016511
日期:2002.12.31
A reported method for preparation of a new class of biheterocyclic thioglycosides via reaction of pyridinethiones with 2,3,4,6-tetra-O-acetyl-alpha-D-gluco- and galactopyranosyl bromides has been studied.
NUCLEIC ACID COMPONENTS AND THEIR ANALOGUES: A NOVEL AND EFFICIENT METHOD FOR THE SYNTHESIS OF A NEW CLASS OF BIPYRIDYL AND BIHETEROCYCLIC-NITRO GEN THIOGLYCOSIDES FROM PYRIDINE-2(1H)-THIONES
作者:Galal H. Elgemeie、Mervat M. El-Enany、Mohamed M. Ismail、Eman K. Ahmed
DOI:10.1081/ncn-120014820
日期:——
ABSTRACT A novelsynthesis of a new class of bipyridyl and biheterocyclic-nitrogen thioglycosides utilizing the reactions of heterocyclic substituted pyridine-2(1H)-thiones and α-bromoglucose or α-bromogalactose tetraacetate as starting components is described.