C07F 9/509
By reduction of pentavalent phosphorus derivatives
Official title: {by reduction of pentavalent phosphorus derivatives, e.g. -P=X with X = O, S, Se or -P-Hal2}
C07F9/509 (By reduction of pentavalent phosphorus derivatives) appears on 44 US grants and 23 published applications in this corpus.
Search patents in C07F- Granted patents
- 44
- Published applications
- 23
- Assignees
- 32
- Inventors
- 99
- Latest grant
- 28 May 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 3 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 5 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 4 | 0 |
| 1998 | 6 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 2 |
| 2002 | 1 | 0 |
| 2003 | 1 | 1 |
| 2004 | 0 | 1 |
| 2005 | 0 | 2 |
| 2006 | 0 | 0 |
| 2007 | 2 | 2 |
| 2008 | 0 | 1 |
| 2009 | 2 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 1 |
| 2013 | 1 | 2 |
| 2014 | 2 | 0 |
| 2015 | 2 | 3 |
| 2016 | 2 | 2 |
| 2017 | 1 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 1 |
| 2020 | 2 | 1 |
| 2021 | 0 | 1 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 1 | 0 |
| 2025 | 0 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for producing phosphorus chemicals from wet process phosphate28 May 2024US 11,993,623 B2Massachusetts Institute of Technology
- Process for the preparation of tetrofosmin or acid salt thereof17 Nov 2020US 10,836,781 B2Jubilant Generics Limited
- Phosphine oxides reduction27 Oct 2020US 10,815,258 B2Rhodia Operations
- Phosphine ligands for catalytic reactions6 Jun 2017US 9,669,399 B2AbbVie Inc.
- Chiral phosphines for palladium-catalyzed asymmetric α-arylation of ester enolates to produce tertiary stereocenters in high enantioselectivity6 Dec 2016US 9,512,155 B2Nanyang Technological University
- Reduction of triphenylphosphine oxide with specific catalyst16 Jul 2026US 2026/0200960 A1Dsm IP Assets B.V.
- Method for preparing phosphine compound based on pyrophosphorous acid22 May 2025US 2025/0163085 A1Zhejiang Yangfan New materials Co., LTD
- Method for producing phosphorus chemicals from wet process phosphate24 Jun 2021US 2021/0188885 A1Massachusetts Institute of Technology
- Phosphine oxides reduction23 Jul 2020US 2020/0231613 A1Rhodia Operations
- An improved process for the preparation of tetrofosmin or acid addition salt thereof19 Dec 2019US 2019/0382423 A1Jubilant Generics Limited (Formerly a division of Jubilant Life Sciences Limited)
Most cited
By later US patents
- Reduction of triphenylphosphine oxide to triphenylphosphine12US 4,113,783 ATexas Alkyls, Inc. · 1978
- Method for producing optically active diphosphine compounds12US 5,693,868 ATakasago International Corporation · 1997
- Synthesis of and hydroformylation with fluoro-substituted bidentate phosphine ligands10US 5,789,624 AHoechst Celanese Corporation · 1998
- Preparation of bidentate ligands9US 5,026,886 AEastman Kodak Company · 1991
- Synthesis of and hydroformylation with fluoro-substituted bidentate phosphine ligands9US 5,773,661 ACelanese International Corporation · 1998