Diamine compounds, which in particular are useful as precursors for the production of liquid crystal alignment layers, represented by general formula (I), wherein A1 represents an organic group of 1 to 40 carbon atoms; A2 represents a hydrogen atom or an organic group of 1 to 40 carbon atoms.
Intramolecular Titanium-Mediated Aminocyclopropanation of Terminal Alkenes: Easy Access to Various Substituted Azabicyclo[<i>n</i>.1.0]alkanes<sup>1</sup>
作者:Gerd-Dieter Tebben、Karsten Rauch、Christian Stratmann、Craig M. Williams、Armin de Meijere
DOI:10.1021/ol027352q
日期:2003.2.1
[reaction: see text] A variety of substituted azabicyclo[n.1.0]alkanes were synthesized by intramolecular titanium-mediated cyclopropanation of N-benzyl-N-(2-alkylalk-3-enyl)formamides and N-benzyl-N-alkadienylformamides. N-Benzylpyrroline upon treatment with Grignard reagents undergoes a titanium-mediated carbomagnesiation to yield N-benzyl-N-(2-alkylbut-3-enyl)amines.
Stereoselective synthesis of azepines through the conjugate addition of formamides to nitroalkenes and subsequent intramolecular nitrile oxide cycloaddition reaction
作者:Akio Kamimura、Takayuki Yoshida、Hidemitsu Uno
DOI:10.1016/j.tet.2008.09.070
日期:2008.12
A concise and stereoselective formation of azepines is achieved through the conjugateaddition of formamides to nitroalkenes and the subsequent intramolecular nitrile oxide cycloaddition (INOC) reaction. High cis-selectivity was observed. The one-pot modification of the two reactions provides direct preparation of azepines from nitroalkenes and formamides in moderate yields. The formyl group was readily
Diamine compounds, which in particular are useful as precursors for the production of liquid crystal alignment layers, represented by general formula (I), wherein A
1
represents an organic group of 1 to 40 carbon atoms; A
2
represents a hydrogen atom or an organic group of 1 to 40 carbon atoms.
Diamine compounds, which in particular are useful as precursors for the production of liquid crystal alignment layers, are represented by the general formula I:
wherein
A
1
represents an organic group of 1 to 40 carbon atoms;
A
2
represents a hydrogen atom or an organic group of 1 to 40 carbon atoms.