Intramolecular annulation of aromatic rings with N-sulfonyl 1,2,3-triazoles: divergent synthesis of 3-methylene-2,3-dihydrobenzofurans and 3-methylene-2,3-dihydroindoles
作者:Xiang-Ying Tang、Yong-Sheng Zhang、Lv He、Yin Wei、Min Shi
DOI:10.1039/c4cc08343a
日期:——
The controllable synthesis of 3-methylene-2,3-dihydrobenzofurans2and 3-methylene-2,3-dihydroindoles5has been developed via cycloisomerization of N/O-tethered aryltriazoles.
Compounds of formula (I) which exhibit excellent immune suppression activity, pharmacologically acceptable salts thereof, esters thereof or other derivatives:
1
wherein R
1
and R
2
are a hydrogen atom, an amino protecting group; R
3
is a hydrogen atom, a hydroxy protecting group; R
4
is a lower alkyl group; n is an integer from 1 to 6; X is an ethylene group; Y is a C
1
-C
10
alkylene group, a C
1
-C
10
alkylene group substituted with 1 to 3 substituents selected from substituent group a and b; R
5
is an aryl group; R
6
and R
7
are a hydrogen atom, a group selected from substituent group a; with the proviso when R
5
is a hydrogen atom, Y is not a single bond or a straight chain C
1
-C
10
alkylene group.
Umlagerungsreaktionen von (2′-Propinyl)cyclohexadienolen und -semibenzolen
作者:Josef Lukáč、Heinz Heimgartner
DOI:10.1002/hlca.19850680210
日期:1985.3.27
Rearrangements of (2′-Propinyl)cyclohexadienols and -semibenzenes
(2'-丙炔基)环己二烯醇和-半苯的重排
Consecutive CH Functionalization Reactions of Arenes: Synthesis of Carbo- and Heteropolycyclic Skeletons
作者:Samuel Suárez-Pantiga、David Palomas、Eduardo Rubio、José M. González
DOI:10.1002/anie.200902989
日期:2009.10.5
Doubling the bet: Two CH bonds become functionalized upon exposure of ω‐aryl propargylic tosylates to Sc(OTf)3 (see scheme). The reaction involves a new domino process that can tolerate both electron‐withdrawing and ‐donating substituents on the arene unit. Different carbo‐ and heterocyclic frameworks can be assembled by using this approach to formally conquer the hydroarylation process.
Amino alcohol derivatives or phosphonic acid derivatives and pharmaceutical compositions containing these
申请人:Nishi Takahide
公开号:US20050043386A1
公开(公告)日:2005-02-24
Amino alcohol compounds and phosphonic acid compounds having excellent immunosuppressive activity, pharmacologically acceptable salts thereof and pharmacologically acceptable esters thereof, and pharmaceutical compositions comprising such compounds, the compounds having the following formula:
wherein R
1
and R
2
each represent hydrogen, or a protecting group of the amino group; R
3
represents hydrogen, or a protecting group of the hydroxyl group; R
4
represents a lower alkyl group; n is 1 to 6; X represents oxygen or nitrogen, which is unsubstituted or substituted with a lower alkyl group; Y represents ethylene; Z represents a C
1
-C
10
alkylene; R
5
represents an aryl group; and R
6
and R
7
each represents hydrogen; provided that when R
5
represents hydrogen, then Z represents a group other than a single bond or a straight chain C
1
-C
10
alkylene group.