1,2-dihydro-3,1-benzoxazin-4-one and 4-H-1,2-dihydro-pyrido-[2,3-d]-[1,3]-oxazin-4-one derivatives as potential prodrugs: Part II: Hydrolysis
作者:Gerhard Schwenker、Jianbing Chen
DOI:10.1002/ardp.2503241112
日期:1991.11
kinetics of the spontaneous hydrolysis of the potentialprodrugs 1a‐1f, 2a‐2g, and 3a‐3e in methanol‐buffer mixtures (3:7) at various pH‐values was studied and a simple analytical uv‐spectroscopic method was developed. The results show that most of the new potentialprodrugs were very quickly reconverted to their parent drugs under these conditions. All of the potentialprodrugs are very sensitive between
1,2-dihydro-3,1-benzoxazin-4-one and 4H-1,2-dihydro-pyrido-[2,3-d]-[1,3]-Oxazin-4-one derivatives as potential prodrugs part I: Synthesis
作者:Gerhard Schwenker、Jianbing Chen
DOI:10.1002/ardp.2503241009
日期:——
1‐Mono‐ and previously unknown 1,2‐disubstituted1,2‐dihydro‐3,1‐benzoxazin‐4‐ones 7 and 9, potential prodrugs of flufenamic acid (6) and mefenamic acid (8), and 4H‐1,2‐dihydro‐pyrido‐[2,3‐d]‐[1,3]‐oxazin‐4‐ones 11, potential prodrugs of niflumic acid (10), were prepared; the structures of all newcompounds wereconfirmed by spectroscopic methods.