Results 321 to 330 of about 3,850,300 (360)
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Total Synthesis of (+)-Astrophylline
The Journal of Organic Chemistry, 2003The first total synthesis of (+)-astrophylline (2) has been achieved, starting from readily available enantiomerically pure (+)-(1R,4S)-4-hydroxycyclopent-2-enyl acetate (11). A novel ruthenium-catalyzed ring-closing ring-opening ring-closing metathesis of carbocyclic olefins of general type 5 was the key step, providing the stereochemically well ...
Marco, Schaudt, Siegfried, Blechert
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Tetrahedron Letters, 1968
The diazotisation of 6,7-dimethoxy- and 7-ethoxy-6-methoxy-1-(2-amino-4,5-methylenedioxybenzyl)-1,2,3,4-tetrahydro-2-methylisoquinoline (XII) and (XV), followed by thermal decomposition, gave amurine (Ib), as a result of which Dopke's structure for the alkaloid was proved to be correct.
T, Kametani, K, Fukumoto, T, Sugahara
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The diazotisation of 6,7-dimethoxy- and 7-ethoxy-6-methoxy-1-(2-amino-4,5-methylenedioxybenzyl)-1,2,3,4-tetrahydro-2-methylisoquinoline (XII) and (XV), followed by thermal decomposition, gave amurine (Ib), as a result of which Dopke's structure for the alkaloid was proved to be correct.
T, Kametani, K, Fukumoto, T, Sugahara
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Total Synthesis of (‐)‐Gambierol.
ChemInform, 2002The first total synthesis of (-)-gambierol (1), a marine polycyclic ether toxin, has been achieved. Key features of the successful synthesis include (1) a convergent union of the ABC and EFGH ring fragments (5 and 6, respectively) via our developed B-alkyl Suzuki-Miyaura cross-coupling strategy leading to the octacyclic polyether core 4 and (2) a late ...
Haruhiko, Fuwa +3 more
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Total Synthesis of (±)‐Strictamine
Angewandte Chemie International Edition, 2016AbstractThe total synthesis of strictamine has been achieved in nine steps from a known enol triflate. Characteristic features of our approach included: a) creation of a C7 all‐carbon quaternary stereocenter at an early synthetic stage; b) use of an N,N‐dimethyl tertiary amine as a surrogate of the primary amine for the rapid build‐up of a ...
Weiwu, Ren, Qian, Wang, Jieping, Zhu
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Science, 1999
Robert F. Service (News Focus, 9 July, p. [184][1]) has written an insightful critique of what insiders call “macho total synthesis,” in which huge teams (20 to 30 postdocs and graduate students representing a critical mass) race to be the first to accomplish the synthesis of extremely complex natural products.
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Robert F. Service (News Focus, 9 July, p. [184][1]) has written an insightful critique of what insiders call “macho total synthesis,” in which huge teams (20 to 30 postdocs and graduate students representing a critical mass) race to be the first to accomplish the synthesis of extremely complex natural products.
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Total Synthesis of (+)-Muconin
The Journal of Organic Chemistry, 2004AbstractFor Abstract see ChemInform Abstract in Full Text.
Takehiko, Yoshimitsu +2 more
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Total Synthesis of (‐)‐Cassine.
ChemInform, 2002AbstractFor Abstract see ChemInform Abstract in Full Text.
Hidefumi, Makabe +2 more
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Chemistry – A European Journal, 2013
Let it grow! The neuritogenic iridoid gelsemiol has been prepared in synthetic form via a radical cascade and skeletal rearrangement. This compound accelerates the differentiation of neurons and growth of neuritis.
Burch, Patrick +8 more
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Let it grow! The neuritogenic iridoid gelsemiol has been prepared in synthetic form via a radical cascade and skeletal rearrangement. This compound accelerates the differentiation of neurons and growth of neuritis.
Burch, Patrick +8 more
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Total Synthesis of (‐)‐Strychnine.
ChemInform, 2004Total synthesis of (-)-strychnine is described. Notable features of our synthesis include (1) palladium-catalyzed coupling of the indole and vinyl epoxide moieties, (2) synthesis of the nine-membered cyclic amine derivative from the diol precursor in a one-pot procedure, and (3) transannular cyclization of the nine-membered cyclic amine.
Yosuke, Kaburagi +2 more
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Total Synthesis of Neooxazolomycin
Angewandte Chemie, 2007AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Hatakeyama, S +5 more
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