Abstract:
@ A process of making nitroalkanes which comprises reacting a lower alkanol, e.g. methanol, and nitric acid (HNO 3 ) in the vapor phase in the presence of a catalyst which is an oxide or a salt of a metal of Group II of the periodic table, e.g. calcium chloride.
Abstract:
The disclosure is directed to: (a) phosphacycle ligands; (b) methods of using such phosphacycle ligands in bond forming reactions; and (c) methods of preparing phosphacycle ligands.
Abstract:
The present application provide processes for the preparation of fingolimod and its pharmaceutically acceptable salts, process for the purification of fingolimod hydrochloride and process for the preparation of amorphous fingolimod hydrochloride.
Abstract:
The disclosure is directed to: (a) phosphacycle ligands; (b) methods of using such phosphacycle ligands in bond forming reactions; and (c) methods of preparing phosphacycle ligands.
Abstract:
This application discloses compounds which are useful in the preparation of himbacine analogs as well as processes for their preparation:
wherein Rs and R 6 are each independently selected from the group consisting of H, alkyl, alkenyl, alkynyl, alkoxy, cycloalkyl, aryl, alkylaryl, arylalkyl, heterocyclic and heteroaryl groups, or R 5 and R 6 , together with the nitrogen to which they are attached, form a 3- to 6-membered heterocyclic compound containing 1-4 heteroatoms, P is a protecting group and is selected from the group consisting of THP or SiR 1 R 2 R 3 , wherein R 1 , R 2 and R 3 are independently selected from the group consisting of H, alkyl, alkenyl, cycloalkyl, aryl, arylalkyl, alkylaryl, heterocyclic, and heteroaryl.
Abstract translation:本申请公开了可用于制备烟肼类似物的化合物及其制备方法:其中R 5和R 6各自独立地选自H,烷基,烯基,炔基,烷氧基,环烷基,芳基,烷基芳基 ,芳基烷基,杂环和杂芳基,或R 5和R 6与它们所连接的氮一起形成含有1-4个杂原子的3-至6-元杂环化合物,P是保护基,并且选自 由THP或SiR 1 R 2 R 3组成的组,其中R 1,R 2和R 3独立地选自H,烷基,烯基,环烷基,芳基,芳基烷基,烷基芳基,杂环和杂芳基。
Abstract:
The application discloses a novel process for the preparation of himbacine analogs useful as thrombin receptor antagonists. The process is based in part on the use of a base-promoted dynamic epimerization of a chiral nitro center. The chemistry taught herein can be exemplified by the following. (I)
Abstract:
Nouveau procédé pour préparer certains dérivés de cyclopentènes à substitution purique optiquement actifs comprenant l'agent antiviral carbovir, et nouveaux intermédiaires utilisés dans ce procédé. La présente invention a tout particulièrement trait à la synthèse de (1R-cis)-4-hydroxyméthyle-2-cyclopentène-1-ol, un intermédiaire dans ce procédé.
Abstract:
2,4-Dichloro-3-alkyl-6-nitrophenols which are useful as intermediate of cyan couplers in color photography are prepared by sulfonating 4-chloro-3-alkyl-phenols to obtain 5-chloro-4-alkylhydroxybenzenesulfonic acids, chlorinating the acids in an aqueous phase to obtain 3,5-dichloro-4-alkyl-2-hydroxybenzenesulfonic acids and nitrating the sulfonic acids.