The scope and regioselectivity of intramolecular N-C rearrangements of orthogonally protected sulfonamides, including cyclization to saccharin derivatives
作者:Amie Saidykhan、Jenessa Ebert、Hashim Ally、Richard T. Gallagher、William H.C. Martin、Richard D. Bowen
DOI:10.1016/j.tetlet.2017.06.053
日期:2017.8
The scope and regiochemistry of the intramolecular N-C rearrangement involving ortholithiation of orthogonally protected sulfonamides in which an N-acyl or N-carboalkoxy group is transferred from nitrogen to the aromatic ring have been explored. Provided that excess lithium diisopropylamide is used, the process is compatible with the presence of acidic α-protons in a substituent attached to the aromatic
The present invention provides a novel compound having an antiviral action, in particular, an HIV replication inhibiting action, as well as a pharmaceutical composition, in particular, an anti-HIV agent.
wherein, a broken line means the presence or absence of a bond; R
1
is substituted or unsubstituted alkyl etc., R
2
is substituted or unsubstituted alkyloxy etc.; n is 1 or 2; R
3
is a substituted or unsubstituted aromatic carbocyclic group; R
4
is a hydrogen atom etc.; R
5
is a substituted or unsubstituted aromatic carbocyclic group etc.; Y is a single bond etc.; R
6
is substituted or unsubstituted alkyl; R
7
is —Z—R
71
etc.; Z is —NR
72
—CO— etc.; R
71
is substituted or unsubstituted alkyl etc.; R
72
is a hydrogen atom etc.
Functionalization of α‐C(sp
<sup>3</sup>
)−H Bonds in Amides Using Radical Translocating Arylating Groups
作者:Niklas Radhoff、Armido Studer
DOI:10.1002/anie.202013275
日期:2021.2.15
α‐C−H arylation of N‐alkylamides using 2‐iodoarylsulfonyl radical translocating arylating (RTA) groups is reported. The method allows the construction of α‐quaternary carbon centers in amides. Various mono‐ and disubstituted RTA‐groups are applied to the arylation of primary, secondary, and tertiary α‐C(sp3)−H‐bonds. These radical transformations proceed in good to excellent yields and the cascades