103203-94-7Relevant academic research and scientific papers
Efficient synthesis of 2-alkylidene-4h-3,1-benzoxathiin-4-ones and determination of their double bond configuration
Shimizu, Masao,Yamanaka, Masaki,Ando, Wataru,Shimada, Shigeru,Konakahara, Takeo,Sakai, Norio
, p. 981 - 993 (2014/04/17)
2-Alkylidene-4H-3,1-benzoxathiin-4-ones were efficiently synthesized by reaction of 2-(acylthio)benzoic acids with condensation reagents in the presence of base. The E and Z isomers of the products were distinguished by comparison of the chemical shifts o
A new synthesis of 4H-1-benzothiopyran-4-ones using (trimethylsilyl)methylenetriphenylphosphorane
Kumar, Pradeep,Bodas, Mandar S
, p. 9755 - 9758 (2007/10/03)
The reaction of silyl ester of S-acyl(aroyl) thiosalicylic acids 3 with (trimethylsilyl)methylenetriphenylphosphorane 4 in step wise fashion leads to the acylphosphoranes 7, which subsequently undergo intramolecular Wittig cyclization on the thiolester carbonyl to afford the 4H-1-benzothiopyran-4-ones 8 in good to excellent yields.
An Efficient Approach to the Synthesis of 4H-1-Benzothiopyran-4-ones via Intramolecular Wittig Reaction
Kumar, Pradeep,Rao, Ashok T.,Pandey, Bipin
, p. 1580 - 1581 (2007/10/02)
The reaction of S-acyl(aroyl)thiosalicylic acids 2 with N-phenyl(triphenylphosphoranylidene)ethenimine 3 in stepwise fashion leads to the acylphosphoranes 5 which subsequently undergo intramolecular Wittig cyclization on the thiolester carbonyl to afford
