Abstract:
One embodiment of the present invention is directed to polysubstituted fullerene moieties having a plurality of substituents thereon, selected from hydroxy, oxide, nitro, amino, organocarboxy, amide, and mixtures thereof. Another embodiment is directed toward the preparation of the novel polysubstituted fullerenes which method comprises contacting fullerenes with an electrophilic reagent such as nitronium ion or an organic peracid. When the electrophilic agent is nitronium ion, the fullerene is further contacted with a nucleophilic reagent. The polysubstituted fullerenes are particularly useful as cross-linking agents in polymers and/or as core building blocks of star polymers.
Abstract:
Disclosed is a process for producing pentachloronitrobenzene (PCNB) by reacting hexachlorobenzene (HEX) with sodium hydrosulfide (NaSH) in the presence of sodium hydroxide (NaOH), sodium carbonate (Na 2 CO 3 ), or mixtures thereof to produce the sodium salt of pentachlorothiophenol (PCTP), followed by reacting it (or PTCP itself after acidifying) with nitric acid in the presence of sulfuric acid or oleum.
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)