Zobrazeno 1 - 10
of 50
pro vyhledávání: '"Dasheng Leow"'
Autor:
Kek Foo Chin, Richmond Lee, Xinyi Ye, Esther Cai Xia Ang, Choon-Hong Tan, Xin Zhang, Adil M. Kabylda, Dasheng Leow, Yongxin Li
Publikováno v:
ACS Catalysis. 10:2684-2691
A highly enantioselective epoxidation reaction of allylic and homoallylic amines has been disclosed using an ion pair catalyst, which consists of chiral cationic bisguanidinium [BG]2+ and an achira...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bd0bd0fc5f7da001f7d87f5fd05d3dc0
https://doi.org/10.1021/acscatal.9b04862
https://doi.org/10.1021/acscatal.9b04862
Publikováno v:
Organic & Biomolecular Chemistry. 17:4689-4699
Guanidines, which exist widely in nature, have been frequently utilised as strong Brønsted bases in organic chemistry. As ligands, guanidines can have different coordination modes with the metal center. However, the exploitation of these guanidine c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b7a10ee8a53f6a3fb72d2095c9926a15
https://doi.org/10.1039/c8ob02240b
https://doi.org/10.1039/c8ob02240b
Automated chemical synthesis has great promises of safety, efficiency, and reproducibility for both research and industry laboratories. Current approaches are based on specifically designed automation systems, which present two major drawbacks: 1) ex
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dbe9bc021480720a90c45f140dfe8150
https://hdl.handle.net/10356/160303
https://hdl.handle.net/10356/160303
Publikováno v:
Asian Journal of Organic Chemistry. 8:25-31
Although the Brook rearrangement has been discovered over fifty years ago, there remains significant opportunities for chemists to make new discoveries relating to this reaction. Majority of the examples in the literature report Brook rearrangements
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b30a1fac15589339466c348348ed259d
https://doi.org/10.1002/ajoc.201800585
https://doi.org/10.1002/ajoc.201800585
Publikováno v:
New Journal of Chemistry. 42:1840-1844
The targeted energetic material 3-amino-1,2,4(4H)-oxadiazol-5-one (AOD) was synthesized from sodium dicyanamide using hydroxylamine hydrochloride in a one-step procedure. AOD was prepared by a novel procedure in good yield and characterized using spe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::49f3395eb9c5ccbc93f3f0993ecf398e
https://doi.org/10.1039/c7nj03950f
https://doi.org/10.1039/c7nj03950f
Publikováno v:
Chemistry, an Asian journal. 14(21)
Chiral guanidines have been widely used as Bronsted base catalysts and phase transfer catalysts in enantioselective reactions. Due to their amendable structure and powerful catalytic ability, they have attracted much interest. Several new catalysts c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e4ab634292191dc06be28b433a6853de
https://pubmed.ncbi.nlm.nih.gov/31562680
https://pubmed.ncbi.nlm.nih.gov/31562680
Publikováno v:
Chemistry - An Asian Journal. 10:1618-1621
A mild photocatalytic hydroperoxyarylation of styrenes has been developed, in which a novel photocatalyst, remazol brilliant blue R (RBBR), is employed at low catalytic loading (1 mol %). The operationally easy procedure uses air as the dioxygen sour
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::41b1ccdf4e3d3024596b9f5acc799f3f
https://doi.org/10.1002/asia.201500497
https://doi.org/10.1002/asia.201500497
Publikováno v:
Journal of the American Chemical Society. 137:4391-4397
Ortho-C(sp(2))-H olefination and acetoxylation of broadly useful synthetic building blocks phenylacetyl Weinreb amides, esters, and ketones are developed without installing an additional directing group. The interplay between the distal weak coordina
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3a9dc77523f0eec76c7c552f409b570e
https://doi.org/10.1021/ja5126897
https://doi.org/10.1021/ja5126897
Publikováno v:
RSC Advances. 5:86402-86406
A direct intermolecular addition of 1,3-dithianes to alkenes has been accomplished via visible-light mediated photocatalysis. This new process proceeds in moderate to excellent yields and eliminates the need for pre-functionalization of substrates. E
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eea2df453a16fa2a66da6fe6f38fa54b
https://doi.org/10.1039/c5ra19069j
https://doi.org/10.1039/c5ra19069j
Autor:
Dasheng Leow
Publikováno v:
Organic Letters. 16:5812-5815
Amides are prevalent in organic synthesis. Developing an efficient synthesis that avoids expensive oxidants and heating is highly desirable. Here the oxidative amidation of aromatic aldehydes is reported using an inexpensive metal-free visible light
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7306f66e182cb62e0c0abcf8566f4668
https://doi.org/10.1021/ol5029354
https://doi.org/10.1021/ol5029354