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Year Number of Results
1923 1
1930 1
1936 2
1937 2
1940 1
1943 1
1945 1
1946 4
1947 3
1948 8
1949 5
1950 4
1951 9
1952 4
1953 7
1954 2
1955 7
1956 5
1957 8
1958 11
1959 11
1960 6
1961 7
1962 11
1963 13
1964 55
1965 104
1966 59
1967 142
1968 116
1969 89
1970 125
1971 252
1972 303
1973 211
1974 173
1975 205
1976 224
1977 151
1978 165
1979 146
1980 169
1981 170
1982 188
1983 191
1984 242
1985 287
1986 285
1987 355
1988 383
1989 433
1990 493
1991 733
1992 774
1993 854
1994 955
1995 1008
1996 1028
1997 1101
1998 1325
1999 1366
2000 1704
2001 1806
2002 1894
2003 1906
2004 2146
2005 2286
2006 2344
2007 2519
2008 2697
2009 2762
2010 2906
2011 3026
2012 3128
2013 3289
2014 3427
2015 3390
2016 3015
2017 2891
2018 3069
2019 3270
2020 3368
2021 3381
2022 3393
2023 2696
2024 979

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75,521 results

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Page 1
Asymmetric Reactions Enabled by Cooperative Enantioselective Amino- and Lewis Acid Catalysis.
Cozzi PG, Gualandi A, Potenti S, Calogero F, Rodeghiero G. Cozzi PG, et al. Top Curr Chem (Cham). 2019 Nov 25;378(1):1. doi: 10.1007/s41061-019-0261-4. Top Curr Chem (Cham). 2019. PMID: 31761979 Review.
In particular, in this review we will summarize the reported processes featuring Lewis acid catalysis and organocatalytic activation modes synergically acting and not interfering with each other. We will focus our attention on the description of processes in which g …
In particular, in this review we will summarize the reported processes featuring Lewis acid catalysis and organocatalytic acti …
Recent Progress in Asymmetric Relay Catalysis of Metal Complex with Chiral Phosphoric Acid.
Wang PS, Chen DF, Gong LZ. Wang PS, et al. Top Curr Chem (Cham). 2019 Dec 27;378(1):9. doi: 10.1007/s41061-019-0263-2. Top Curr Chem (Cham). 2019. PMID: 31879793 Review.
Such a catalysis merges the advantages of both metal catalysis and organocatalysis, providing step-economy, and, more importantly, the potential to achieve inaccessible reactivity by a single catalyst. ...The combination of metal complexes and chiral phosphoric a …
Such a catalysis merges the advantages of both metal catalysis and organocatalysis, providing step-economy, and, more importan …
Asymmetric Synthesis of Chromans Through Bifunctional Enamine-Metal Lewis Acid Catalysis.
Davis J, Gharaee M, Karunaratne CV, Cortes Vazquez J, Haynes M, Luo W, Nesterov VN, Cundari T, Wang H. Davis J, et al. Chemistry. 2022 May 11;28(27):e202200224. doi: 10.1002/chem.202200224. Epub 2022 Apr 1. Chemistry. 2022. PMID: 35298095
Cooperative enamine-metal Lewis acid catalysis has emerged as a powerful tool to construct carbon-carbon and carbon-heteroatom bond forming reactions. ...This difficult organic transformation was achieved through bifunctional enamine-metal Lewis acid catal …
Cooperative enamine-metal Lewis acid catalysis has emerged as a powerful tool to construct carbon-carbon and carbon-heteroatom …
Asymmetric Binary Acid Catalysis: Switchable Enantioselectivity in Enantioselective Conjugate Hydride Reduction.
Wang M, Song R, Yang D, Lv J. Wang M, et al. Org Lett. 2023 Jan 20;25(2):373-377. doi: 10.1021/acs.orglett.2c04087. Epub 2023 Jan 10. Org Lett. 2023. PMID: 36627725
The exchange of the metal ion from Zr(IV) to Fe(III) leads to a switch in the enantioselectivity of binary acid-catalyzed conjugate hydride reductions. In the presence of Hantzsch ester, gamma-indolyl beta,gamma-unsaturated alpha-keto esters could be reduced to the desired …
The exchange of the metal ion from Zr(IV) to Fe(III) leads to a switch in the enantioselectivity of binary acid-catalyzed conjugate h …
Deracemization through Sequential Photoredox-Neutral and Chiral Bronsted Acid Catalysis.
Gu Z, Zhang L, Li H, Cao S, Yin Y, Zhao X, Ban X, Jiang Z. Gu Z, et al. Angew Chem Int Ed Engl. 2022 Dec 5;61(49):e202211241. doi: 10.1002/anie.202211241. Epub 2022 Nov 9. Angew Chem Int Ed Engl. 2022. PMID: 36250910
Here, we report a new platform based on photoredox-neutral catalysis, allowing efficient and modular optical enrichment of alpha-amino esters and other valuable analogues. Two single-electron transfer processes between the photocatalyst and the substrates serve to provide …
Here, we report a new platform based on photoredox-neutral catalysis, allowing efficient and modular optical enrichment of alpha-amin …
Bronsted Acid versus Phase-Transfer Catalysis in the Enantioselective Transannular Aminohalogenation of Enesultams.
Luis-Barrera J, Rodriguez S, Uria U, Reyes E, Prieto L, Carrillo L, Pedrón M, Tejero T, Merino P, Vicario JL. Luis-Barrera J, et al. Chemistry. 2022 Nov 7;28(62):e202202267. doi: 10.1002/chem.202202267. Epub 2022 Oct 17. Chemistry. 2022. PMID: 36111677 Free PMC article.
We have studied the enantioselective transannular aminohalogenation reaction of unsaturated medium-sized cyclic benzosulfonamides by using both chiral Bronsted acid and phase-transfer catalysis. Under optimized conditions, a variety of bicyclic adducts can be obtain …
We have studied the enantioselective transannular aminohalogenation reaction of unsaturated medium-sized cyclic benzosulfonamides by using b …
Enantioselective synthesis of indole-based unnatural beta-Alkynyl alpha-amino acid derivatives via chiral phosphoric acid catalysis.
Woldegiorgis AG, Gu H, Lin X. Woldegiorgis AG, et al. Chirality. 2022 Apr;34(4):678-693. doi: 10.1002/chir.23422. Epub 2022 Feb 7. Chirality. 2022. PMID: 35128727
The synthesis of unnatural alpha-amino acid derivatives has attracted considerable interest in recent years, as they are ubiquitous in protein synthesis and peptide-based drug discovery. Herein, we reported the chiral phosphoric acid catalyzed asymmetric reaction of …
The synthesis of unnatural alpha-amino acid derivatives has attracted considerable interest in recent years, as they are ubiquitous i …
Implementing dilute acid pretreatment coupled with solid acid catalysis and enzymatic hydrolysis to improve bioconversion of bamboo shoot shells.
Tang W, Tang Z, Qian H, Huang C, He YC. Tang W, et al. Bioresour Technol. 2023 Aug;381:129167. doi: 10.1016/j.biortech.2023.129167. Epub 2023 May 12. Bioresour Technol. 2023. PMID: 37182678
Exploiting bamboo shoot shells (BSS) as feedstocks for biorefining is a crucial scheme to advance the bioavailability of bamboo shoots. This work applied traditional dilute sulfuric acid pretreatment (DAP) to treat BSS and simultaneously prepared the solid-acid-cata …
Exploiting bamboo shoot shells (BSS) as feedstocks for biorefining is a crucial scheme to advance the bioavailability of bamboo shoots. This …
Super Bronsted acid catalysis.
Cheon CH, Yamamoto H. Cheon CH, et al. Chem Commun (Camb). 2011 Mar 21;47(11):3043-56. doi: 10.1039/c0cc04867d. Epub 2011 Jan 18. Chem Commun (Camb). 2011. PMID: 21246123
Bronsted acid catalysis has emerged as a new class of catalysis in modern organic synthesis. However, in order to make the utility of the Bronsted acid catalysis as broad as the well-developed Lewis acid catalysis, it is desirable …
Bronsted acid catalysis has emerged as a new class of catalysis in modern organic synthesis. However, in order to make …
Multifunctional Organocatalysts - Singly-Linked and Macrocyclic Bisphosphoric Acids for Asymmetric Phase-Transfer and Bronsted-Acid Catalysis.
Thiele M, Rose T, Lõkov M, Stadtfeld S, Tshepelevitsh S, Parman E, Opara K, Wölper C, Leito I, Grimme S, Niemeyer J. Thiele M, et al. Chemistry. 2023 Jan 9;29(2):e202202953. doi: 10.1002/chem.202202953. Epub 2022 Nov 7. Chemistry. 2023. PMID: 36161384 Free PMC article.
Here, we present the first systematic investigation of singly-linked and macrocyclic bisphosphoric acids, including their synthesis and their application in phase-transfer and Bronsted acid catalysis. ...In contrast, bisphosphoric acids with flexible l …
Here, we present the first systematic investigation of singly-linked and macrocyclic bisphosphoric acids, including their synthesis a …
75,521 results
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