Plural carbocyclic rings bonded directly to the same acyclic carbon

Subclass of:

544 - Organic compounds -- part of the class 532-570 series

544000000 - ORGANIC COMPOUNDS (CLASS 532, SUBCLASS 1)

544000000 - HETEROCYCLIC CARBON COMPOUNDS CONTAINING A HETERO RING HAVING CHALCOGEN (I.E., OXYGEN, SULFUR, SELENIUM, OR TELLURIUM) OR NITROGEN AS THE ONLY RING HETERO ATOMS (Class 540, subclass 1)

544001000 - Hetero ring is six-membered having two or more ring hetero atoms of which at least one is nitrogen (e.g., selenazines, etc.)

544224000 - The six-membered hetero ring consists of two nitrogens and four carbons (e.g., 1,2-diazines, etc.)

544336000 - 1,4-diazines

544358000 - Piperazines (i.e., fully hydrogenated 1,4-diazines)

Patent class list (only not empty are listed)

Deeper subclasses:

Class / Patent application number	Description	Number of patent applications / Date published
544396000	Plural carbocyclic rings bonded directly to the same acyclic carbon	6
20080262229	Diarylmethyl Piperazine Derivatives, Preparations Thereof and Uses Thereof - Compounds of formula:	10-23-2008
20090018337	PROCESS FOR THE PREPARATION OF A PHARMACEUTICAL INTERMEDIATE - The present invention relates to a process for the preparation of {2-[4-(α-phenyl-p-chlorobenzyl)-piperazin-1-yl]-ethoxy}-acetic acid-N,N-dimethylamide of the Formula (I) and enantiomers thereof. The compound of the Formula (I) or enantiomers thereof are important pharmaceutical intermediates suitable for direct transformation into non-sedating antihistamine type pharmaceutical active ingredients cetirizine and levocetirizine.	01-15-2009
20090030205	Process for obtaining cetirizine dihydrochloride - Process for the synthesis of cetirizine dihydrochloride, wherein	01-29-2009
20090221823	OPTICALLY ACTIVE CARBAMATES, PROCESS FOR PREPARATION THEREOF AND USE THEREOF AS PHARMACEUTICAL INTERMEDIATES - The present invention is related to 1-[(4-chlorophenyl)-phenylmethyl]-4-(2,2,2-trichloroethoxycarbonyl)-piperazine of the Formula (IV) and optically isomers thereof, process for preparation thereof and the use of the compound of the Formula (IV) in the preparation of 1-(4-chlorophenyl)-phenylmethyl-piperazine and optical isomers and salts thereof. 1-(4-chlorophenyl)-phenylmethyl-piperazine and optical isomers thereof are important intermediates in the preparation of non-sedating antihistamine-type active pharmaceutical ingredients.	09-03-2009
20110172425	NOVEL WATER BASED PROCESS FOR THE PREPARATION OF SUBSTITUTED DIPHENYLMETHYL PIPERAZINES - The present invention relates to a novel water based process for the preparation of substituted diphenylmethyl piperazines of Formula I and pharmaceutically acceptable salts	07-14-2011
20110184174	Processes for the Synthesis of Levocetirizine and Intermediates for Use Therein - The present invention provides a compound of formula (IV)	07-28-2011