Patents Assigned to Aldrich Chemical Co., Inc.
  • Process of synthesizing chemically and optically pure B-halodiiso-2-ethylapopinocampheylboranes
    Patent number: 5220072
    Abstract: A chemically and optically pure B-halodiiso-2-ethylapopinocampheylborane of essentially 100% ee represented by the formula: ##STR1## wherein B is borane and X is halo and a process for preparing.
    Type: Grant
    Filed: March 23, 1992
    Date of Patent: June 15, 1993
    Assignee: Aldrich Chemical Co., Inc.
    Inventor: Herbert C. Brown
  • Optically active dimethylorganoboranes
    Patent number: 5210310
    Abstract: A novel process for producing hindered and unhindered primary amines represented by the formula RNH.sub.2 and R*NH.sub.2 in high yields from novel intermediates RBMe.sub.2 or R*BMe.sub.2 wherein R is an organo group, R* is a chiral organo group, attached to boron, B is boron and Me is methyl.
    Type: Grant
    Filed: March 26, 1990
    Date of Patent: May 11, 1993
    Assignee: Aldrich Chemical Co., Inc.
    Inventor: Herbert C. Brown
  • Novel optically active halo-substituted tetrahydrofurans
    Patent number: 4918207
    Abstract: A process for producing the optically pure (+)- or (-) isomer of a pheynl- or substituted- phenylalkanolamine compounds having pharmacologic activity without the need for resolution processes and novel intermediates useful in the process including optically pure haloalcohols are provided.
    Type: Grant
    Filed: June 12, 1989
    Date of Patent: April 17, 1990
    Assignee: Aldrich Chemical Co., Inc.
    Inventor: Herbert C. Brown