排序方式: 共有3条查询结果,搜索用时 0 毫秒
1
1.
Pakorn Bovonsombat Pratheep Khanthapura Michael M. Krause Juthamard Leykajarakul 《Tetrahedron letters》2008,49(49):7008-7011
The combination of catalytic amounts of p-toluenesulfonic acid and 1 equiv of N-halosuccinimide afforded highly selective ring-halogenation of N-acetyl-l-tyrosine, furnishing either N-acetyl-3-halo-l-tyrosine analogues or mixed 3,5-dihalo derivatives in a one-pot reaction with excellent yields at room temperature. 相似文献
2.
Pakorn Bovonsombat Rameez Ali Chiraphorn Khan Juthamard Leykajarakul Kawin Pla-on Suraj Aphimanchindakul Natchapon Pungcharoenpong Nisit Timsuea Anchalee Arunrat Napat Punpongjareorn 《Tetrahedron》2010,66(34):6928-181
para-Regioselective bromination of phenol and analogues, promoted by p-toluenesulfonic acid, is achieved in high to excellent yields at room temperature with N-bromosuccinimide. Chlorination with N-chlorosuccinimide and catalysed by p-toluenesulfonic acid also gives para-chlorinated phenol analogues in good yields at room temperature. 相似文献
3.
Pakorn Bovonsombat Rungkarn Rujiwarangkul Thanathip Bowornkiengkai Juthamard Leykajarakul 《Tetrahedron letters》2007,48(49):8607-8610
Facile α-bromination of cyclic enones and linear enals involving N-bromosuccinimide and 1-2 equiv of pyridine-N-oxide is reported herein. α-Bromination of linear enals was found to proceed with double bond geometry retention. 相似文献
1