IP Library › Granted Patent US 8,541,609
Granted Patent B2
US 8,541,609 · App. 13/451,034 · Granted Sep 24, 2013

Exemestane and its intermediates and methods of making the same

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Quick Facts
Patent No.
US 8,541,609
App. No.
13/451,034
Granted
Sep 24, 2013
Kind
B2
Abstract

A method is provided for preparing an aromatase inhibitor of formula (I) wherein each of R 1 , R 2 , R 3 , R 4 , independently, is hydrogen, halogen or C 1 -C 6 alkyl. In one form, the aromatase inhibitor is exemestane wherein each of R 1 , R 2 , R 3 , R 4 is hydrogen. In the method, a compound of formula (II) wherein R 1 , R 2 , R 3 , R 4 are as defined above and R is alkylene, is reacted with a deprotonating agent and a compound of the formula R 5 SO 2 X wherein R 5 is C 1 -C 5 alkyl and X is halogen so as to obtain a compound of formula (III) wherein R 1 , R 2 , R 3 , R 4 , R 5 are as defined above. The compound of Formula (III) is then reacted with a base to form an aromatase inhibitor of formula (I).

Claims (4)

1. A compound of the formula (IV):

wherein each of R 1 , R 2 , R 3 , R 4 , independently, is hydrogen, halogen or C 1 -C 6 alkyl, and R 6 is SO 2 R 5 wherein R 5 is C 1 -C 5 alkyl.

2. The compound of claim 1 wherein each of R 1 , R 2 , R 3 , R 4 is hydrogen.

3. The compound of claim 1 wherein R 5 is methyl.

Assignments (10)
ASSIGNMENT OF SECURITY INTEREST IN INTELLECTUAL PROPERTY, RECORDED ON SEPTEMBER 1, 2017, AT REEL/FRAME 043746/0621 Recorded Mar 17, 2025
From: BARCLAYS BANK PLC, AS EXISTING AGENT
To: APOLLO ADMINISTRATIVE AGENCY LLC, AS SUCCESSOR AGENT
Reel/Frame 070531/0279 →
PARTIAL RELEASE OF FIRST LIEN SECURITY INTEREST IN PATENTS RECORDED ON SEPTEMBER 1, 2017, AT REEL/FRAME 043746/0621 Recorded Aug 20, 2024
From: BARCLAYS BANK PLC, AS COLLATERAL AGENT
To: CURIA WISCONSIN, INC.
Reel/Frame 068725/0776 →
PARTIAL RELEASE OF SECOND LIEN SECURITY INTEREST IN PATENTS RECORDED ON SEPTEMBER 6, 2021, AT REEL/FRAME 057423/0665 Recorded Aug 20, 2024
From: WILMINGTON TRUST, NATIONAL ASSOCIATION, AS COLLATERAL AGENT
To: CURIA WISCONSIN, INC.
Reel/Frame 068725/0782 →
SECURITY INTEREST Recorded Sep 6, 2021
From: CURIA GLOBAL, INC. (FKA ALBANY MOLECULAR RESEARCH, INC.); CURIA MASSACHUSETTS, INC. (FKA AMRI BURLINGTON, INC.); CURIA WISCONSIN, INC. (FKA CEDARBURG PHARMACEUTICALS, INC.); CURIA INDIANA, LLC (FKA AMRI SSCI, LLC); CURIA NEW MEXICO, LLC (FKA OSO BIOPHARMACEUTICALS MANUFACTURING, LLC); CURIA IP HOLDINGS, LLC
To: WILMINGTON TRUST, NATIONAL ASSOCIATION, AS COLLATERAL AGENT
Reel/Frame 057423/0665 →
RELEASE OF SECURITY INTEREST Recorded Oct 29, 2020
From: MORGAN STANLEY SENIOR FUNDING, INC., AS COLLATERAL AGENT
To: ALBANY MOLECULAR RESEARCH, INC.; AMRI BURLINGTON, INC.; CEDARBURG PHARMACEUTICALS, INC.; EUTICALS INC.; OSO BIOPHARMACEUTICALS MANUFACTURING, LLC
Reel/Frame 054252/0687 →
CORRECTIVE ASSIGNMENT TO CORRECT THE INCORRECT PATENT NO. 7541537 PREVIOUSLY RECORDED AT REEL: 034045 FRAME: 0951. ASSIGNOR(S) HEREBY CONFIRMS THE SECURITY INTEREST. Recorded Aug 14, 2018
From: ALBANY MOLECULAR RESEARCH, INC.; ALO ACQUISITION LLC; AMRI BURLINGTON, INC.; AMRI RENSSELAER, INC.; CEDARBURG PHARMACEUTICALS, INC.; OSO BIOPHARMACEUTICALS MANUFACTURING, LLC
To: BARCLAYS BANK PLC, AS THE COLLATERAL AGENT
Reel/Frame 046796/0352 →
FIRST LIEN SECURITY AGREEMENT Recorded Sep 1, 2017
From: ALBANY MOLECULAR RESEARCH, INC.; AMRI BURLINGTON, INC.; CEDARBURG PHARMACEUTICALS, INC.; EUTICALS INC.; OSO BIOPHARMACEUTICALS MANUFACTURING, LLC-BY ITS SOLE MEMBER: ALO ACQUISITION LLC
To: BARCLAYS BANK, PLC AS COLLATERAL AGENT
Reel/Frame 043746/0621 →
SECOND LIEN SECURITY AGREEMENT Recorded Sep 1, 2017
From: ALBANY MOLECULAR RESEARCH, INC.; AMRI BURLINGTON, INC.; CEDARBURG PHARMACEUTICALS, INC.; EUTICALS INC.; OSO BIOPHARMACEUTICALS MANUFACTURING LLC-BY ITS SOLE MEMBER:ALO ACQUISITION LLC
To: MORGAN STANLEY SENIOR FUNDING, INC.
Reel/Frame 043746/0657 →
RELEASE OF SECURITY INTEREST Recorded Aug 31, 2017
From: BARCLAYS BANK PLC, AS COLLATERAL AGENT
To: ALBANY MOLECULAR RESEARCH, INC.; ALO ACQUISITION LLC; AMRI BURLINGTON, INC.; AMRI RENSSELAER, INC.; CEDARBURG PHARMACEUTICALS, INC.; OSO BIOPHARMACEUTICALS MANUFACTURING, LLC; AMRI SSCI, LLC; EUTICALS INC.
Reel/Frame 043742/0085 →
SECURITY INTEREST Recorded Oct 24, 2014
From: ALBANY MOLECULAR RESEARCH, INC.; ALO ACQUISITION LLC; AMRI BURLINGTON, INC.; AMRI RENSSELAER, INC.; CEDARBURG PHARMACEUTICALS, INC.; OSO BIOPHARMACEUTICALS MANUFACTURING, LLC
To: BARCLAYS BANK PLC, AS THE COLLATERAL AGENT
Reel/Frame 034045/0951 →