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Table representation of search results timeline featuring number of search results per year.

Year Number of Results
1851 1
1858 1
1885 1
1896 1
1899 1
1901 1
1902 2
1903 3
1904 1
1908 1
1909 1
1911 2
1912 1
1915 2
1916 4
1919 2
1922 1
1923 2
1924 3
1925 1
1927 1
1928 2
1929 2
1930 1
1935 1
1936 1
1938 1
1940 2
1942 4
1943 1
1944 1
1945 3
1946 7
1947 13
1948 36
1949 17
1950 18
1951 24
1952 34
1953 32
1954 34
1955 25
1956 33
1957 26
1958 29
1959 20
1960 22
1961 30
1962 20
1963 21
1964 32
1965 38
1966 39
1967 42
1968 58
1969 74
1970 59
1971 84
1972 55
1973 80
1974 71
1975 97
1976 87
1977 88
1978 76
1979 80
1980 77
1981 80
1982 79
1983 82
1984 90
1985 104
1986 99
1987 127
1988 115
1989 119
1990 165
1991 142
1992 147
1993 149
1994 145
1995 167
1996 185
1997 145
1998 167
1999 189
2000 207
2001 192
2002 203
2003 216
2004 222
2005 250
2006 248
2007 254
2008 232
2009 302
2010 339
2011 309
2012 387
2013 383
2014 385
2015 349
2016 382
2017 405
2018 461
2019 501
2020 491
2021 576
2022 582
2023 551
2024 234

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11,822 results

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Page 1
Tropylium-promoted Ritter reactions.
Doan SH, Hussein MA, Nguyen TV. Doan SH, et al. Chem Commun (Camb). 2021 Sep 6;57(71):8901-8904. doi: 10.1039/d1cc02947a. Chem Commun (Camb). 2021. PMID: 34486600
The Ritter reaction used to be one of the most powerful synthetic tools to functionalize alcohols and nitriles, providing valuable N-alkyl amide products. ...Herein, we report the development of a new method using salts of the tropylium ion to promote the Ritter rea …
The Ritter reaction used to be one of the most powerful synthetic tools to functionalize alcohols and nitriles, providing valuable N- …
Synthesis of Arylamides via Ritter-Type Cleavage of Solid-Supported Aryltriazenes.
Wippert NA, Jung N, Bräse S. Wippert NA, et al. ACS Comb Sci. 2019 Aug 12;21(8):568-572. doi: 10.1021/acscombsci.9b00096. Epub 2019 Jul 2. ACS Comb Sci. 2019. PMID: 31264846
A novel route for the synthesis of N-arylamides via the cleavage of aryltriazenes with alkyl or aryl nitriles is presented. We developed a variation of the Ritter reaction that allows the use of acetonitrile as solvent and reagent in reactions with solid-supported precurso …
A novel route for the synthesis of N-arylamides via the cleavage of aryltriazenes with alkyl or aryl nitriles is presented. We developed a v …
Ritter-enabled catalytic asymmetric chloroamidation of olefins.
Steigerwald DC, Soltanzadeh B, Sarkar A, Morgenstern CC, Staples RJ, Borhan B. Steigerwald DC, et al. Chem Sci. 2020 Dec 7;12(5):1834-1842. doi: 10.1039/d0sc05224h. Chem Sci. 2020. PMID: 34163947 Free PMC article.
To circumvent this issue, acetonitrile, possessing a low HalA, was used as the nucleophile in the catalytic asymmetric Ritter-type chloroamidation of allyl-amides. This method is compatible with Z and E alkenes with both alkyl and aromatic substitution. ...We also report t …
To circumvent this issue, acetonitrile, possessing a low HalA, was used as the nucleophile in the catalytic asymmetric Ritter-type ch …
A copper-catalyzed Ritter-type cascade via iminoketene for the synthesis of quinazolin-4(3H)-ones and diazocines.
Abe T, Kida K, Yamada K. Abe T, et al. Chem Commun (Camb). 2017 Apr 21;53(31):4362-4365. doi: 10.1039/c7cc01406f. Epub 2017 Apr 4. Chem Commun (Camb). 2017. PMID: 28374023
We have developed a copper-catalyzed Ritter-type reaction/cyclization cascade of anthranilic acids and nitriles, affording the quinazolin-4(3H)-ones. The cascade proceeds through a Ritter-type reaction capturing the iminoketene intermediates by nitriles. ...
We have developed a copper-catalyzed Ritter-type reaction/cyclization cascade of anthranilic acids and nitriles, affording the quinaz …
Visible-Light-Induced Four-Component Ritter-Type Reaction: Access to beta-Trifluoromethyl Imides.
Ma R, Ren Y, Deng Z, Wang KH, Wang J, Huang D, Lv X, Hu Y. Ma R, et al. Org Lett. 2023 Jun 9;25(22):4080-4085. doi: 10.1021/acs.orglett.3c01291. Epub 2023 May 26. Org Lett. 2023. PMID: 37234032
A visible-light-induced four-component Ritter-type reaction was developed for the synthesis of beta-trifluoromethyl imides from CF(3)Br, alkenes, carboxylic acids, and nitriles. ...Furthermore, this method has been proven to be suitable for the late-stage diversification o …
A visible-light-induced four-component Ritter-type reaction was developed for the synthesis of beta-trifluoromethyl imides from CF(3) …
Spigelian Hernias: A high volume institutional review.
Ritter EM. Ritter EM. Surg Open Sci. 2023 Jul 22;15:60. doi: 10.1016/j.sopen.2023.07.010. eCollection 2023 Sep. Surg Open Sci. 2023. PMID: 37645599 Free PMC article. No abstract available.
"Contribution to the Question of Pneumotyphus": a discussion of the original article by J. Ritter in 1880.
Harris RL, Williams TW Jr. Harris RL, et al. Rev Infect Dis. 1985 Jan-Feb;7(1):119-22. doi: 10.1093/clinids/7.1.116. Rev Infect Dis. 1985. PMID: 3885364
In 1880, Dr. J. Ritter wrote a classic infectious disease article (originally in German) on psittacosis entitled, "Contribution to the Question of Pneumotyphus." ...Ritter's astute observations and their significance are discussed in this paper....
In 1880, Dr. J. Ritter wrote a classic infectious disease article (originally in German) on psittacosis entitled, "Contribution to th …
Reproduction without polarity in the work of Johann Wilhelm Ritter.
Holland J. Holland J. Hist Philos Life Sci. 2020 Oct 27;42(4):52. doi: 10.1007/s40656-020-00343-w. Hist Philos Life Sci. 2020. PMID: 33108539
This essay focuses on the work of a writer who proposed an unusual alternative to polarity-based ideas of reproduction. Johann Wilhelm Ritter (1776-1810) was a physicist and friend to the German Romantics and someone whose writing also shares many interests with German Nat …
This essay focuses on the work of a writer who proposed an unusual alternative to polarity-based ideas of reproduction. Johann Wilhelm Ri …
A Lewis acid-promoted Pinner reaction.
Pfaff D, Nemecek G, Podlech J. Pfaff D, et al. Beilstein J Org Chem. 2013 Aug 2;9:1572-7. doi: 10.3762/bjoc.9.179. eCollection 2013. Beilstein J Org Chem. 2013. PMID: 23946857 Free PMC article.
In the reaction of benzyl alcohols variable amounts of amides are formed in a Ritter-type side reaction....
In the reaction of benzyl alcohols variable amounts of amides are formed in a Ritter-type side reaction....
Periodontal splinting.
Ritter AV. Ritter AV. J Esthet Restor Dent. 2004;16(5):329-30. doi: 10.1111/j.1708-8240.2004.tb00062.x. J Esthet Restor Dent. 2004. PMID: 15726804 No abstract available.
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