C07D 203/02
Preparation by ring-closure
C07D203/02 (Preparation by ring-closure) appears on 32 US grants and 25 published applications in this corpus.
Search patents in C07D- Granted patents
- 32
- Published applications
- 25
- Assignees
- 28
- Inventors
- 136
- Latest grant
- 23 Apr 2019
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 3 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 1 |
| 2002 | 1 | 1 |
| 2003 | 2 | 1 |
| 2004 | 1 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 3 |
| 2010 | 2 | 3 |
| 2011 | 0 | 1 |
| 2012 | 2 | 2 |
| 2013 | 2 | 0 |
| 2014 | 1 | 2 |
| 2015 | 2 | 1 |
| 2016 | 0 | 1 |
| 2017 | 3 | 5 |
| 2018 | 1 | 1 |
| 2019 | 3 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Joint production method and device for aziridine, piperazine and triethylenediamine23 Apr 2019US 10,266,541 B2Xi'an Modern Chemistry Research Institute
- Method and catalyst for synthesising aziridine16 Apr 2019US 10,259,784 B2University of East Anglia
- Carboxylic acid derivatives and use thereof in the preparation of prodrugs26 Mar 2019US 10,239,851 B2
- Direct stereospecific synthesis of unprotected aziridines from olefins5 Jun 2018US 9,988,349 B2
- Joint production method and device for aziridine, piperazine and triethylenediamine26 Dec 2017US 9,850,250 B2Xi'an Modern Chemistry Research Institute
- Sacubitril intermediate, preparation method therefor, and use thereof13 Feb 2025US 2025/0051270 A1Shenzhen Catalys Technology Co., Ltd
- Joint production method and device for aziridine, piperazine and triethylenediamine5 Apr 2018US 2018/0093993 A1Xi'an Modern Chemistry Research Institute
- Method and catalyst for synthesising aziridine30 Nov 2017US 2017/0342030 A1University of East Anglia
- Inhibitors of hepatitis c virus2 Nov 2017US 2017/0313745 A1Gilead Sciences, Inc.
- Method and catalyst for synthesising aziridine1 Jun 2017US 2017/0152225 A9University of East Anglia
Most cited
By later US patents
- Dehydration catalyst for making ethylenimine10US 4,301,036 AThe Dow Chemical Company · 1981
- Tetrazine-based bio-orthogonal coupling reagents and methods9US 8,236,949 B2University of Delaware · 2012
- Carboxylic acid derivatives and use thereof in the preparation of prodrugs7US 10,239,851 B22019
- Process for the preparation of an oxirane, azirdine or cyclopropane7US 5,703,246 AZeneca Limited · 1997
- Continuous process for the preparation of alkyleneimines7US 7,683,216 B2BASF SE · 2010