Ketene Research Articles

Synthese von arsino-ketenen auf dem inether-weg

The arsino ketenes 3a–c are formed by the reaction of the arsino ynethers 1a and b with chlorodiphenylarsine and bromotriphenylgermane and by the reaction of the silylated ynether 1c with chlorodiphenylarsine.

Studies on Ketene and Its Derivatives 114. 1,4-Cycloaddition of Ketene to Ethyl N-(2-Pyridyl)formimidates

Studies on Ketene and Its Derivatives 114. 1,4-Cycloaddition of Ketene to Ethyl N-(2-Pyridyl)formimidates

Preparation of α,β-Unsaturated Ketene Diphenylthioacetals by the Dehydration ofgem-Diphenylthiocyclopropylcarbinols

Preparation of α,β-Unsaturated Ketene Diphenylthioacetals by the Dehydration of<i>gem</i>-Diphenylthiocyclopropylcarbinols

Sila-pummerer rearrangements at sp 2-hybridized carbon

α-Trimethylsilylvinyl sulfoxides undergo sila-Pummerer rearrangements upon warming in benzene. Alkynes, vinylsulfoxides, and ketene S,O-acetals are obtained as products.

(Chloroacyl)diphenylphosphanes as Sources of Halogenated ketenes

AbstractThe complete manuscript of this communication appears in: Angew. Chem. Suppl. 1982, 913. DOI:10.1002/anie.198209130

Studies on Ketene and Its Derivatives (CVIII). Photoreaction of Diketene with Uracil (Complement)

Studies on Ketene and Its Derivatives (CVIII). Photoreaction of Diketene with Uracil (Complement)

Studies on ketene and its derivatives. CVII. Photoreaction of diketene with 6-methyluracil.

Studies on ketene and its derivatives. CVII. Photoreaction of diketene with 6-methyluracil.

Cycloadducts Derived from Sulfenes or Ketenes and Tropone or Analogs of Tropone

Cycloadducts Derived from Sulfenes or Ketenes and Tropone or Analogs of Tropone

Photoreactions of Sterically Hindered Ketenes

Photoreactions of Sterically Hindered Ketenes

Studies on Ketene and Its Derivatives. CIII. Synthesis of Fused 4-Pyrimidones and Their Photoreactions

Studies on Ketene and Its Derivatives. CIII. Synthesis of Fused 4-Pyrimidones and Their Photoreactions

Studies on ketene and its derivatives. CV. Photoreaction of diketene with sec-alcohols.

Studies on ketene and its derivatives. CV. Photoreaction of diketene with sec-alcohols.

ケテンおよびその誘導体の研究(第104報)3-アミノクロトンアミド誘導体とジケテンとの反応

ケテンおよびその誘導体の研究(第104報)3-アミノクロトンアミド誘導体とジケテンとの反応

Studies on ketene and its derivatives. CVI. Photoreaction of diketene with N-phenylmaleimide and dimethyl-N-phenylmaleimide.

Studies on ketene and its derivatives. CVI. Photoreaction of diketene with N-phenylmaleimide and dimethyl-N-phenylmaleimide.

Some chlorine fluorosulfonate and peroxydisulfuryl-difluoride reactions

Abstract Chlorine fluorosulfonate adds exceptionally easy not only to various alkenes, perfluorobenzene, but to alkynes too The addition of peroxydisulfuryldifluoride to alkyl- and perfluoroalkyliodides leads to unstable adducts, which decompose with the formation of alkylfluorosulfonates and iodine fluorosulfonate; the latter was trapped with fluoroalkenes The use of ClOSO2F allows to substitute selectively for the fluorosulfonate group the chlorine atom in monochloroacetic acid esters as well as the fluorine atom in hexafluoroacetone N-fluoroimine ClOSO2F serves as an exceptionally active chlorinating reagent for fluorinated alcohols, nitrosocompounds, perfluoroacid amides and particularly for benzene The reaction of (OSO2F)2 with perfluoroacid amides leads to the corresponding N,N-bis(fluorosulfonate)amides, which easily rearrange into alkylfluorosulfonates The hypochlorites of fluorinated alcohols are stable enough and they, similarly to ClOSO2F, are able to add to alkenes, fluoroalkenes (but not to perfluoroisobutylene), bis(trifluoromethyl)ketene, trifluoromethylisocyanate and perfluoronitriles The fluorosulfonatoacetic acid esters are unstable at the ambient temperature, but they can be widely used in situ as a very effective alkylating reagents

Ketene and its derivatives. 100. 1-(Dimethylphosphono)- and 1-(diphenylphosphinyl)-5-oxo-4-oxaspiro[2.3]hexanes. Synthesis and some reactions

Ketene and its derivatives. 100. 1-(Dimethylphosphono)- and 1-(diphenylphosphinyl)-5-oxo-4-oxaspiro[2.3]hexanes. Synthesis and some reactions

Studies on ketene and its derivatives. 98. 1,1-Dichloro-5-oxo-4-oxaspiro[2.3]hexane. Synthesis and reactions

Studies on ketene and its derivatives. 98. 1,1-Dichloro-5-oxo-4-oxaspiro[2.3]hexane. Synthesis and reactions

A new synthesis of 14-tetradecanolide from cyclododecanone.

The ω-hydroxy ynamine (2) is cyclized to the ketene N,O-acetal (3) which gives, on hydrolysis, natural 14-tetradecanolide (1).

2‐Pyronbildung aus 5‐halogensubstituierten (Z)‐2,4‐Pentadiensäuren und deren Alkylestern

Formation of 2‐Pyrones from 5‐Halogen‐substituted (Z)‐2,4‐Pentadienoic Acids and their Alkyl EstersThe thermolysis of the isomeric tetrachloro‐phenyl‐pentadienoic acids 1a, 4a und the corresponding esters lb, 4b yields the same 2‐pyrone 2. This fact is explained by 1,5‐chlorine shift within a ketene intermediate.

Deprotonation studies in α-oxoketene dithioacetals. I.

Deprotonations of α-benzoyl ketene dithiomethylacetals with LDA/HMPA resulted in kinetic deprotonations at three different sites depending on the other α-substituents.

Synthesis of Spirofluorenes via Ketene Adducts

Synthesis of Spirofluorenes via Ketene Adducts