Preparation of amides mediated by isopropylmagnesium chloride under continuous flow conditions
作者:Juan de M. Muñoz、Jesús Alcázar、Antonio de la Hoz、Ángel Díaz-Ortiz、Sergio-A. Alonso de Diego
DOI:10.1039/c2gc35037h
日期:——
mediated by Grignard reagents (the Bodrouxreaction) is described. The procedure can be applied to a wide variety of primary and secondary amines and anilines, as well as to aromatic and aliphatic esters. The flow approach leads to improved yields and selectivities in the reaction, which has a sustainable purification procedure and a simple scale-up. This reaction represents an efficient and green alternative
The present invention concerns prodrugs of opioid analgesics and pharmaceutical compositions containing such prodrugs. Methods for providing more consistent pain relief by increasing the bioavailability of the opioid analgesic with the aforementioned prodrugs are provided. The invention also provides for decreasing the adverse GI side effects of opioid analgesics.
The present provides a condensed pyridine compound (I) represented by the following formula:
(wherein, R2 represents
ring A represents benzene ring, pyridine ring, thiophene ring or furan ring; and
B represents
its pharmaceutically acceptable salt or hydrates thereof, which is a clinically useful medicament having a serotonin antagonism, in particular, that for treating, ameliorating or preventing spastic paralysis or central muscle relaxants for ameliorating myotonia.
Organocatalytic Asymmetric Annulation between Hydroxymaleimides and Nitrosoarenes: Stereoselective Preparation of Chiral Quaternary <i>N</i>-Hydroxyindolines
highly effective asymmetric annulation of nitrosoarenes with hydroxymaleimides catalyzed by a chiral bifunctional amine squaramide catalyst has been disclosed. A wide range of highly fused chiral N-hydroxyindolines with two consecutive quaternary stereocenters and multifunctional groups were directly and effectively prepared in excellent yields (up to >99%) with complete regioselective cyclization and
已公开了一种由手性双官能胺方酸方胺催化剂催化的亚硝基芳烃与羟基马来酰亚胺的不寻常且高度有效的不对称环化反应。直接和有效地制备了具有两个连续的季位立体中心和多功能基团的各种高度融合的手性N-羟基二氢吲哚,具有良好的收率(高达99%),具有完全的区域选择性环化和出色的立体选择性(高达> 99:1 dr 99%ee)。通过精细地转化为一系列新的手性二氢吲哚,可以很好地证明新反应和目标手性实体的效率和潜力。