Biotransformation of organic sulfides. Part 6. Formation of chiral para-substituted benzyl methyl sulfoxides by Helminthosporium species NRRL 4671
摘要:
The fungus Helminthosporium species NRRL 4671 has been used for the biotransformation of a series of para-substituted benzyl sulfides with substituent groups consisting of trifluoromethyl, halo, hydroxy, methoxy, acetoxy, nitro, cyano, amino, acetamido, acyl and carboxylic acid units. In all cases, sulfoxide formation occurred in good yield and with predominant (S) chirality at the sulfur position. A minor amount of sulfone product was also obtained from the halo- and methoxy-substituted substrates.
Biotransformation of organic sulfides. Part 6. Formation of chiral para-substituted benzyl methyl sulfoxides by Helminthosporium species NRRL 4671
摘要:
The fungus Helminthosporium species NRRL 4671 has been used for the biotransformation of a series of para-substituted benzyl sulfides with substituent groups consisting of trifluoromethyl, halo, hydroxy, methoxy, acetoxy, nitro, cyano, amino, acetamido, acyl and carboxylic acid units. In all cases, sulfoxide formation occurred in good yield and with predominant (S) chirality at the sulfur position. A minor amount of sulfone product was also obtained from the halo- and methoxy-substituted substrates.
Active site model of cyclohexanone monooxygenase. 3. The case of benzyl sulfides bearing polar groups
作者:Gianluca Ottolina、Piero Pasta、David Varley、Herbert L. Holland
DOI:10.1016/s0957-4166(96)00450-8
日期:1996.12
The stereopreference of cyclohexanone monooxygenase for a series of benzyl methyl sulfides bearing in the p-position groups with different σp values has been rationalized by locating inside the enzyme activesitemodel electron-rich and electron-poor regions.