Zobrazeno 1 - 10
of 131
pro vyhledávání: '"Donald C. Dittmer"'
Autor:
Donald C. Dittmer, Dmitry V. Avilov, Venkata Subbarao Kandula, Matthew T. Purzycki, Zachary J. Martens, Elliot B. Hohn, Matthew W. Bacler
Publikováno v:
ARKIVOC, Vol 2010, Iss 6, Pp 61-83 (2009)
Externí odkaz:
https://doaj.org/article/705a5d53590745b296d87c6fbe80a8c3
Autor:
Matthew Purzycki, Venkata Subbarao Kandula, Matthew W. Bacler, Elliot Hohn, Dmitry V. Avilov, Donald C. Dittmer, Zachary J. Martens
Publikováno v:
ARKIVOC, Vol 2010, Iss 6, Pp 61-83 (2009)
Treatment of alpha-bromoacyl amides of esters of N-protected alpha-amino acids with lithium telluride yields an amide enolate which cyclizes to unstable tetramic acids (2, 4-pyrrolidinediones) which can be converted to stable derivatives (e.g. enol e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c0207322ff2c839a76c85ec2a6d46f61
https://doi.org/10.3998/ark.5550190.0011.608
https://doi.org/10.3998/ark.5550190.0011.608
Publikováno v:
The Journal of Organic Chemistry. 70:4682-4686
Coumarins, 4-hydroxycoumarins, and 4-hydroxyquinolin-2(1H)-ones can be conveniently prepared by treatment of alpha-halocarboxylic acid esters of salicylaldehyde, o-hydroxyacetophenone, methyl salicylate, and methyl N-methyl- or N-phenylanthranilates
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ac5d037a2d2498e0ffa546b51f7d1d80
https://doi.org/10.1021/jo050070u
https://doi.org/10.1021/jo050070u
Publikováno v:
Organic Letters. 6:2225-2228
[reaction: see text] Acylcyclopropanemethanol tosylates undergo rapid ring opening at room temperature by the action of lithium telluride to produce the enolate of a homoallylic ketone. The enolate can be protonated to yield the corresponding ketone
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2b8f02dc333e911243ff68cacdc1bc1a
https://doi.org/10.1021/ol0492804
https://doi.org/10.1021/ol0492804
Autor:
Bin Chao, Donald C. Dittmer
Publikováno v:
Tetrahedron Letters. 41:6001-6004
Telluride ion reacts with an oxiranemethanol toluenesulfonate in toluene under phase-transfer conditions to give an allylic alkoxide anion that is trapped by addition to an adjacent α,β-unsaturated ester to yield a furan derivative. Use of a non-ra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3e442eaa98e095fcc2c25525e0613367
https://doi.org/10.1016/s0040-4039(00)01047-9
https://doi.org/10.1016/s0040-4039(00)01047-9
Autor:
Qinyu Xu, Donald C. Dittmer
Publikováno v:
Tetrahedron Letters. 40:2255-2258
Non-racemic or racemic allylic amines are obtained by treatment of sulfonate esters of 5-hydroxymethyl-2-oxazolidinones with telluride ion.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7e1f8fbe36c961a86e6fc0c313c5bb51
https://doi.org/10.1016/s0040-4039(99)00219-1
https://doi.org/10.1016/s0040-4039(99)00219-1
Autor:
Aurora S. Pepito, Donald C. Dittmer
Publikováno v:
The Journal of Organic Chemistry. 62:7920-7925
Sulfonate esters of aziridinemethanols are converted to allylic amines by treatment with telluride ion obtained by reduction of elemental tellurium. In the course of the reaction, tellurium(0) is reformed and may be reused, thus removing the need to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c6ce4e43848d6cde4c4eb3d71c38eace
https://doi.org/10.1021/jo962024n
https://doi.org/10.1021/jo962024n
Publikováno v:
Tetrahedron. 53:12131-12146
Elemental tellurium can be reduced by rongalite (HOCH2SO2Na·2H2O)-KOH in the solid phase by application of ultrasound or by microwave irradiation. Without solvent, the organic substrate (eg sulfonate ester of an oxiranemethanol) is added with furthe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::69dbcdf04b5d77e963a4650cc72229be
https://doi.org/10.1016/s0040-4020(97)00547-4
https://doi.org/10.1016/s0040-4020(97)00547-4
Publikováno v:
Tetrahedron Letters. 36:7209-7212
Treatment of 1,2-diol cyclic sulfates (1,3,2-dioxathiolane 2,2-dioxides) with telluride ion, generated in situ by reduction of the element, yields alkenes rapidly (10 min- 2 h) under mild conditions (0 °C to room temperature). The reaction is stereo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::58ac30b37e9345b7316c7efc5af5c133
https://doi.org/10.1016/0040-4039(95)01532-m
https://doi.org/10.1016/0040-4039(95)01532-m