Zobrazeno 1 - 10
of 24
pro vyhledávání: '"Chul Shim, Sang"'
Publikováno v:
Tetrahedron Letters. 34:2143-2146
Photolysis of 1-phenyl-1,3,5-heptatriyne with unsyrmmetrical olefins such as acrylonitrile, methyl acrylate, and styrene in deaerated methylene chloride yields three regioselective [2+2] type 1:1 photoadducts.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7e36c4ba4ea10c472ebab6a45fb966f3
https://doi.org/10.1016/s0040-4039(00)60366-0
https://doi.org/10.1016/s0040-4039(00)60366-0
Publikováno v:
Tetrahedron Letters. 31:4765-4768
Samarium(II) iodide mediated intramolecular reductive coupling of carbonyl groups and alkynes in the presence of HMPA and t-BuOH was successfully performed to provide cyclized products. Some cyclic compounds containing a heteroatom such as oxygen or
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::730c17d727a6d4d72a19cbe6d8f55917
https://doi.org/10.1016/s0040-4039(00)97728-1
https://doi.org/10.1016/s0040-4039(00)97728-1
Publikováno v:
In Tetrahedron Letters 1999 40(24):4575-4576
Publikováno v:
Journal of Organometallic Chemistry. 443:C22-C23
Palladium-catalyzed allylation of carboranylacetic esters gives C-allyl derivatives in high yield. Thus, a new type of stabilized carbonucleophiles with the electron-withdrawing o -carboranyl group has been made.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9d57f364f301c77b6c15135164b9b614
https://doi.org/10.1016/0022-328x(93)80307-w
https://doi.org/10.1016/0022-328x(93)80307-w
Publikováno v:
Tetrahedron Letters. 31:105-106
Treatment of primary amines with pimelaldehyde in the presence of tetracarbonylhydridoferrate, HFe(CO) 4 − at room temperature under atmospheric pressure of CO for 24 hours gave selectively corresponding N-(cyclohexylmethyl)-N-alkylamines in modera
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::41bc614b8fe710c8de2f83ad9deb018c
https://doi.org/10.1016/s0040-4039(00)94345-4
https://doi.org/10.1016/s0040-4039(00)94345-4
Publikováno v:
In Tetrahedron Letters 2002 43(44):7987-7989
Autor:
Nam Choi Kui, Chul Shim Sang
Publikováno v:
Tetrahedron Letters. 26:3277-3278
Reductive amination of organic azides using tetracarbonylhydrido- ferrate(O) gave the corresponding amines in good to excellent yields at room temperature or −40°C under carbon monoxide atmosphere.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ddc6c2747d25db5b06ab3e232bfefbd1
https://doi.org/10.1016/s0040-4039(00)98171-1
https://doi.org/10.1016/s0040-4039(00)98171-1
Publikováno v:
Tetrahedron Letters. 26:5775-5776
Absolute stereochemistry of panaxynol was determined by exciton chirality method. The circular dichroism spectra of panaxynol p-bromobenzoate and p-dimethylaminobenzoate show the negative exciton chirality at λ ext indicating the S configuration of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f29e04195f454194d11b8ebfe96c2015
https://doi.org/10.1016/s0040-4039(00)98923-8
https://doi.org/10.1016/s0040-4039(00)98923-8
Autor:
Sik Kim Sung, Chul Shim Sang
Publikováno v:
Tetrahedron Letters. 26:765-766
1,4-Diphenylbutadiyne(DPB) and several olefins such as 2,3-dimethyl-2-butene, 1,4-cyclohexadiene and dimethyl fumarate were irradiated with 300 nm UV light to obtain interesting cross-cycloaddition products.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::999912f0fb421e0b63daf590b739881a
https://doi.org/10.1016/s0040-4039(00)89131-5
https://doi.org/10.1016/s0040-4039(00)89131-5
Publikováno v:
Phytochemistry. 22:1817-1818
Two major and two minor polyacetylenes were isolated from fresh Korean ginseng roots. The chemical structure of the two major polyacetylenes separated were determined by UV, IR, 1 H NMR, 13 C NMR, mass spectra and elemental analysis. One of them was
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2fc65fb9b995a54b1e9ba3d9596150dc
https://doi.org/10.1016/s0031-9422(00)80278-2
https://doi.org/10.1016/s0031-9422(00)80278-2