Synthesis and hetero-Diels–Alder reactions of enantiomerically pure dihydro-1<i>H</i>-azepines
作者:Donald Craig、Samuel R. J. Spreadbury、Andrew J. P. White
DOI:10.1039/d0cc04413j
日期:——
Thermolysis of enantiomerically pure 3-substituted 7,7-dihalo-2-azabicyclo[4.1.0]heptanes in the presence of K2CO3 gives in good yields 2-alkyl-6-halo-1-tosyl-2,3-dihydro-1H-azepines. These undergo highly stereoselective [4+2] cycloaddition reactions with heterodienophiles and arylation/alkenylation under Suzuki conditions.
对映体纯的3-取代的7,7-二卤-2-氮杂双环[4.1.0]庚烷在K 2 CO 3的存在下热解可得到高产率的2-烷基-6-卤代-1-甲苯基-2,3-二氢-1 H-氮杂。它们在Suzuki条件下与异二烯体进行高度立体选择性的[4 + 2]环加成反应,并进行芳基化/烯基化。