Synthetic approaches to nortropanes and nortrop-6-enes; intramolecular displacement by nitrogen in 7-membered rings
摘要:
The synthesis of simple nortropane and nortrop-6-ene derivatives from cyclohepta-1,3-diene is described. The key intermediates are trans-1-amino-4-chloro-cycloheptanes and -cyclohept-2-enes which are derived efficiently from the corresponding cis-amino-alcohols and undergo intramolecular cyclisation. Corresponding derivatisation of cyclohexa- and cycloocta-1,3-dienes is explored and attempts to achieve Pd-catalysed cyclisation of 1-amino-4-acetoxy-derivatives is described. Nitrogen inversion data for selected nortropane derivatives are included.
A simple approach to nortropane and nortrop-6-ene derivatives
作者:Antoinette Bathgate、John R. Malpass
DOI:10.1016/s0040-4039(01)81095-9
日期:1987.1
Intramolecular cyclisation of -1-(benzylamino)-4-chlorocycloheptane and hept-2-ene gives the corresponding 8-azabicyclo[3.2.1]octane (nortropane) and -oct-6-ene (nortrop-6-ene) derivatives respectively. Under appropriate conditions, cyclohepta-1,3-diene is converted into nortropane in 75% overall yield.
Synthetic approaches to nortropanes and nortrop-6-enes; intramolecular displacement by nitrogen in 7-membered rings
作者:Antoinette Naylor (nee Bathgate)、Nicola Howarth、John R. Malpass
DOI:10.1016/s0040-4020(01)80313-6
日期:1993.1
The synthesis of simple nortropane and nortrop-6-ene derivatives from cyclohepta-1,3-diene is described. The key intermediates are trans-1-amino-4-chloro-cycloheptanes and -cyclohept-2-enes which are derived efficiently from the corresponding cis-amino-alcohols and undergo intramolecular cyclisation. Corresponding derivatisation of cyclohexa- and cycloocta-1,3-dienes is explored and attempts to achieve Pd-catalysed cyclisation of 1-amino-4-acetoxy-derivatives is described. Nitrogen inversion data for selected nortropane derivatives are included.