99197-86-1Relevant academic research and scientific papers
Radical-Mediated Strategies for the Functionalization of Alkenes with Diazo Compounds
Su, Yong-Liang,Liu, Geng-Xin,Liu, Jun-Wen,Tram, Linh,Qiu, Huang,Doyle, Michael P.
supporting information, p. 13846 - 13855 (2020/09/21)
One of the most common reactions of diazo compounds with alkenes is cyclopropanation, which occurs through metal carbene or free carbene intermediates. Alternative functionalization of alkenes with diazo compounds is limited, and a methodology for the addition of the elements of Z-CHR2 (with Z = H or heteroatom, and CHR2 originates from N2 CR2) across a carbon-carbon double bond has not been reported. Here we report a novel reaction of diazo compounds utilizing a radical-mediated addition strategy to achieve difunctionalization of diverse alkenes. Diazo compounds are transformed to carbon radicals with a photocatalyst or an iron catalyst through PCET processes. The carbon radical selectively adds to diverse alkenes, delivering new carbon radical species, and then forms products through hydroalkylation by thiol-assisted hydrogen atom transfer (HAT), or forms azidoalkylation products through an iron catalytic cycle. These two processes are highly complementary, proceed under mild reaction conditions, and show high functional group tolerance. Furthermore, both transformations are successfully performed on a gram-scale, and diverse γ-amino esters, γ-amino alcohols, and complex spirolactams are easily prepared with commercially available reagents. Mechanistic studies reveal the plausible pathways that link the two processes and explain the unique advantages of each.
Antirhinoviral heteroamine-substituted pyridazines
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, (2008/06/13)
Novel pyridazinamines having antirhinoviral activity, compositions containing these compounds as active ingredient, and a method of inhibiting combating or preventing the growth of viruses in warm-blooded animals suffering from diseases caused by these viruses.
Condensed seven-membered ring compounds, their production and use
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, (2008/06/13)
Novel condensed seven-membered ring compounds of the formula: STR1 [wherein R1 and R2 are independently hydrogen, halogen, trifluoromethyl, lower alkyl or lower alkoxy, or both jointly form tri- or tetramethylene; R3 and R5 are independently hydrogen, lower alkyl or aralkyl; R4 is hydrogen or lower alkyl; R6 is a condensed or non-condensed hetero-alicyclic containing at least one atom of N, O and S as a ring-forming atom which may be substituted; A is an alkylene chain; n is 1 or 2] and salts thereof. These compounds exhibit inhibitory activity on angiotensin converting enzyme and so forth, and are of value as an agent for diagnosis, prevention and treatment of circulatory diseases, such as hypertension, cardiopathy and cerebral apoploxy.
3-Amino-4-oxo-2,3,4,5-tetrahydro-1,5-benzoxazepine derivatives
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, (2008/06/13)
Novel 3-amino-4-oxo-2,3,4,5-tetrahydro-1,5-benzoxazepine derivatives of the formula STR1 [wherein R1 and R2 are independently hydrogen, halogen, trifluoromethyl, lower alkyl or lower alkoxy, or both jointly form tri- or tetramethylene; R3 is hydrogen, optionally substituted lower alkyl or optionally substituted aralkyl; R4 is hydrogen, optionally substituted alkyl, optionally substituted aralkyl or optionally substituted cycloalkylalkyl; Y is a carboxyl group which may be esterified or amidated; m is 1 or 2] and salts thereof. These compounds and salts thereof exhibits inhibitory activity on angiotensin converting enzyme and so forth, and are of value as an agent for diagnosis, prevention and treatment of circulatory diseases (e.g. hypertension, cardiopathy, cerebral apoploxy).
