Inventor
YOKOZAWA TOHRU
JP16 patents
⚠️ This page may combine multiple inventors who share the name “YOKOZAWA TOHRU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
TAKASAGO PERFUMERY CO LTD
11 patentsUS5847222ADec 8, 1998
Optically active diphosphine compound, method for making the compound, transition metal complex having the compound as ligand and method for making optically active substance by use of the complex
TAKASAGO PERFUMERY CO LTD22 citations92
US5872273AFeb 16, 1999
Chiral diphosphine compound intermediate for preparing the same transition metal complex having the same diphosphine compound as ligand and asymmetric hydrogenation catalyst
TAKASAGO PERFUMERY CO LTD34 citations88
US6333291B1Dec 25, 2001
Optically active diphosphine compound, production intermediate thereof, transition metal complex containing the compound as ligand and asymmetric hydrogenation catalyst containing the complex
TAKASAGO PERFUMERY CO LTD17 citations83
US5693868ADec 2, 1997
Method for producing optically active diphosphine compounds
TAKASAGO PERFUMERY CO LTD18 citations82
US6492545B2Dec 10, 2002
Process for producing optically active alcohol
TAKASAGO PERFUMERY CO LTD12 citations74
US6313317B1Nov 6, 2001
Ruthenium-phosphine complex and method for producing the same
TAKASAGO PERFUMERY CO LTD10 citations73
US5808162ASep 15, 1998
Chiral unsymmetric diphosphine compound and transition metal complex containing the same as ligand
TAKASAGO PERFUMERY CO LTD12 citations73
US6472539B1Oct 29, 2002
Production process of diphosphine oxide and diphosphonate
TAKASAGO PERFUMERY CO LTD2 citations61
US6794328B2Sep 21, 2004
Diphosphine compound, production intermediate thereof, transition metal complex containing the compound as ligand and asymmetric hydrogenation catalyst containing the complex
TAKASAGO PERFUMERY CO LTD1 citations52
US7312347B2Dec 25, 2007
Substituted optically active disphosphine compound
TAKASAGO PERFUMERY CO LTD0 citations51
US7601842B2Oct 13, 2009
Method for producing an optically active tetrahydroquinoline
TAKASAGO PERFUMERY CO LTD0 citations49