摘要:

AbstractNaphtho[1′,2′:4,5]thieno[2,3‐c][1,10]phenanthroline and naphtho[2′,1′:4,5]thieno[2,3‐c][1,10]phenanthroline, two novel polycyclic heterocyclic ring systems, have been synthesized in four steps from known starting materials. The total1H nmr spectral assignments were made using a COSY experiment to identify the s

ISSN:0022-152X    

DOI:10.1002/jhet.5570330131

出版商:Wiley‐Blackwell    

年代:1996

数据来源: WILEY

摘要:

AbstractThe synthesis of two previously unknown novel polycyclic heterocyclic ring systemsviaphotocyclization is described. The structural assignment of the isomeric ring systems,4and5, was achieved by the total assignment of their1H and13C nmr spectra by the concerted usage of two‐dimensional nmr method

ISSN:0022-152X    

DOI:10.1002/jhet.5570330132

出版商:Wiley‐Blackwell    

年代:1996

数据来源: WILEY

摘要:

AbstractSwern oxidation of saturated (1,4‐benzoxazine‐2‐yl)‐methanols 2 furnished 4H‐1,4‐benzoxazine‐2‐carbaldehydes 3, which possess an α,β ethylenic bond. The reactivity of these compo

ISSN:0022-152X    

DOI:10.1002/jhet.5570330133

出版商:Wiley‐Blackwell    

年代:1996

数据来源: WILEY

摘要:

Abstract5‐(α‐Fluorovinyl)tryptamines4a, 4band 5‐(α‐fluorovinyl)‐3‐(N‐methyl‐1′,2′,5′,6′‐tetrahydropyridin‐3′‐ and ‐4′‐yl) indoles5a, 5bwere synthesized using 5‐(α‐fluorovinyl)indole (7). The target compounds are bioisosteres of 5‐carboxyamido substituted t

ISSN:0022-152X    

DOI:10.1002/jhet.5570330134

出版商:Wiley‐Blackwell    

年代:1996

数据来源: WILEY

摘要:

AbstractIsothiosemicarbazides2react with acyl isothiocyanates under addition‐cyclization to yield 1,3,4‐thiadiazoline‐2‐imines3as well as the isomeric 2‐amino‐substituted 1,3,4‐thiadiazolium‐5‐acylaminides3′. In a similar manner the 2‐hydrazino‐substituted 1,3‐thiazoline4adds ethoxycarbonyl isothiocyanate to give the thiosemicarbazide5, which undergoes a rearrangement to the 1,3,4‐thiadiazoline‐2‐imine 5′. The [2+2] cycloreversion of3dinvolving ethoxycarbonyl iso(thio)cyanate and the thermal induced Dimroth rearrang

ISSN:0022-152X    

DOI:10.1002/jhet.5570330135

出版商:Wiley‐Blackwell    

年代:1996

数据来源: WILEY

摘要:

AbstractNew 2‐oxoazepino[3,4,5‐cd]indole derivatives were formed by the reaction of the tosylate SK&F 98339 withN‐alkyl andN‐arylidenepropylamines in moderat

ISSN:0022-152X    

DOI:10.1002/jhet.5570330136

出版商:Wiley‐Blackwell    

年代:1996

数据来源: WILEY

摘要:

AbstractTreatment of benzaldehyde l‐(2‐propenyl)‐4‐methylsulfonylphenylhydrazone (1f) with 45% sulfuric acid gave 2‐(4‐methylsulfonylphenyl)‐6‐phenylhexahydro‐4‐pyridazinol (2f) in 35% yield rather than the expected 1‐(4‐methylsulfonylphenyl)‐1‐(2‐propenyl)hydrazine. The halogen‐substituted hydrazones1c‐1eand benzaldehyde 1‐(2‐methyl‐2‐propenyl)

ISSN:0022-152X    

DOI:10.1002/jhet.5570330137

出版商:Wiley‐Blackwell    

年代:1996

数据来源: WILEY

摘要:

AbstractDichlorocarbene, generated from ethyl trichloroacetate and sodium ethoxide, reacts with 2,3‐dimethyl‐5,6‐dihydro‐1,4‐oxathiin to give 7,7‐dichloro‐1,6‐dimethyl‐2‐oxa‐5‐thiabicyclo[4,1,0]heptane, and with 2,3‐dimethyl‐5,6‐dihydro‐1,4‐dithiin to give 6‐chloro‐2,3‐dihydro‐7‐methyl 5‐methylene‐5(H)‐1,4‐dithiepin. Both

ISSN:0022-152X    

DOI:10.1002/jhet.5570330138

出版商:Wiley‐Blackwell    

年代:1996

数据来源: WILEY

摘要:

AbstractDipyrrylmethanes are smoothly and efficiently oxidized to dipyrryl ketones by ceric ammonium nitrate in water‐tetrahydrofuran‐acetic acid solvent at room temperat

ISSN:0022-152X    

DOI:10.1002/jhet.5570330139

出版商:Wiley‐Blackwell    

年代:1996

数据来源: WILEY