Zobrazeno 1 - 10
of 96
pro vyhledávání: '"Christian B W, Stark"'
Publikováno v:
Molecules, Vol 29, Iss 20, p 4885 (2024)
By treatment of the peracetylated methylester of 4-acetylamino-2,4-dideoxy-d-glycero-d-galacto-octonic acid (ADOA-PAE) with nitrosyl tetrafluoroborate, a serendipitous formation of a highly functionalized carbohydrate–pyrazole conjugate was observe
Externí odkaz:
https://doaj.org/article/cff9ff191e044ebb8dc545ed0e05c08c
Publikováno v:
Molecules, Vol 29, Iss 9, p 2144 (2024)
meso-Tetrahexylporphyrin was converted to its corresponding 7,8-dihydroxychlorin using an osmium tetroxide-mediated dihydroxylation strategy. Its diol moiety was shown to be able to undergo a number of subsequent oxidation reactions to form a chlorin
Externí odkaz:
https://doaj.org/article/595798f7205340508e6cfe15e66972e6
Publikováno v:
Beilstein Journal of Organic Chemistry, Vol 12, Iss 1, Pp 2104-2123 (2016)
The direct oxidative cyclization of 1,5-dienes is a valuable synthetic method for the (dia)stereoselective preparation of substituted tetrahydrofurans. Closely related reactions start from 5,6-dihydroxy or 5-hydroxyalkenes to generate similar product
Externí odkaz:
https://doaj.org/article/6306aeb6fb42483faa4b378dd4c8e201
Publikováno v:
Chemsuschem
The upcycling of waste biomass into valuable materials by resource‐efficient chemical transformations is a prime objective for sustainable chemistry. This approach is demonstrated in a straightforward light‐driven synthesis of polyols and polyure
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::94cc236b118bc18e60c8a1a8f0ee3ede
https://doi.org/10.1002/cssc.202101175
https://doi.org/10.1002/cssc.202101175
Autor:
Sidra Tariq, Sadaf Mutahir, Muhammad Asim Khan, Zeeshan Mutahir, Safdar Hussain, Muhammad Ashraf, Xiaofang Bao, Baojing Zhou, Christian B. W. Stark, Islam Ullah Khan
Publikováno v:
Chemistry & Biodiversity. 19
A series of 1,3,4-oxadiazole-2-thiol derivatives bearing various alkyl or aryl moieties were designed, synthesized, and characterized using modern spectroscopic methods to yield 17 compounds (6a-6q) that were screened for acetylcholinesterase (AChE)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ead3930560c9a808c67e9345600492ed
https://doi.org/10.1002/cbdv.202200157
https://doi.org/10.1002/cbdv.202200157
Publikováno v:
Beilstein Journal of Organic Chemistry, Vol 10, Iss 1, Pp 1228-1232 (2014)
The heronapyrroles A–C have first been isolated from a marine-derived Streptomyces sp. (CMB-0423) in 2010. Structurally, these natural products feature an unusual nitropyrrole system to which a partially oxidized farnesyl chain is attached. The var
Externí odkaz:
https://doaj.org/article/6d3929317c2344a0ad5ef6dd1c2d6caa
Publikováno v:
Organic Letters. 21:5417-5420
The use of carbohydrate thiolates for facile, high-yielding, regio- and stereoselective nucleophilic substitution reactions of complex pentafluorophenyl-substituted porphyrinoids is reported. The title reaction has successfully been applied to calix[
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bb9aea5fa8a8bc347ad9383634ba32b4
https://doi.org/10.1021/acs.orglett.9b01542
https://doi.org/10.1021/acs.orglett.9b01542
Publikováno v:
Organic letters. 22(9)
Oxidative cleavage of N-acetyl-neuraminic acid (Neu5Ac, 1) leads to the open chain octonic acid (ADOA, 2), which under various conditions is transformed into an acyclic acid or ester or into a six- or five-membered octonic acid lactone and lactam, re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0db3c095fcf9d15bb8df4e6492f5ff64
https://pubmed.ncbi.nlm.nih.gov/32281381
https://pubmed.ncbi.nlm.nih.gov/32281381
Autor:
Christian B. W. Stark, Maik Tretbar
Publikováno v:
European Journal of Organic Chemistry. 2017:6942-6946
Tetramine ligands play an important role in a broad range of transition metal catalyzed transformations. We here present a flexible and modular approach to this class of ligands using a double reductive amination strategy. Thus, the target molecules
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::41132239c0d143abec5eaeb22bc7d120
https://doi.org/10.1002/ejoc.201700772
https://doi.org/10.1002/ejoc.201700772
Autor:
Leona J. Gross, Christian B. W. Stark
Publikováno v:
Organic & Biomolecular Chemistry. 15:4282-4285
We here present a highly efficient and high yielding procedure for the preparation of 2-vinyl tetrahydrofurans starting from α-hydroxymethyl tetrahydrofurans. Best results for this dehydration were achieved using Burgess' reagent in dioxane under mi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::09c8d457f9f67ef9b39eb55618c761ed
https://doi.org/10.1039/c7ob00607a
https://doi.org/10.1039/c7ob00607a