Introduction of Aromatic and Heteroaromatic Groups in the 2- and 8-Positions of the Tröger’s Base Core by Suzuki, Stille and Negishi Cross-Coupling Reactions - A Comparative Study

Synthesis and Isolation of a Homochiral Nanohoop Composed of a Tröger's Base and Hexaparaphenylene

The synthesis of a new nanohoop containing a stereogenic Tröger's base skeleton tethered to a curved hexaparaphenylene ([6]CPP) is reported. The TB[6]CPP nanohoop possesses a stable C2 symmetrical structure, which promotes the allowed transition that gives rise to pale blue emission with a quantum yield of ~0.69, surpassing the value of the more symmetrical [8]CPP. Moreover, TB[6]CPP shows chiroptical properties including circular dichroism and circularly polarized luminescence with a moderate dissymmetry factor (|glum|) of ~2.1×10-3.

CuI-catalyzed amination of Tröger's base halides: a convenient method for synthesis of unsymmetrical Tröger's bases

A convenient and efficient Ullmann type copper catalyzed amination method has been developed for direct amination of halogen substituted Tröger's base analogues.

Chemoselective cross-coupling reactions with differentiation between two nucleophilic sites on a single aromatic substrate

A new thiophene building block, containing both a stannyl group and a boronic ester, was prepared. From this starting material, a general, nucleophile-selective one-pot reaction was developed, exploiting the different reactivities of the Stille and Suzuki-Miyaura cross-coupling reactions. A series of aromatic electrophiles were used to demonstrate the high functional group tolerance.

Diethyl 6H,12H-5,11-methano-dibenzo[b,f][1,5]diazo-cine-1,7-dicarboxyl-ate

In the mol-ecule of the title compound, C(21)H(22)N(2)O(4), the 1,7-diethyl ester analogue of Tröger's base, the dihedral angle between the two benzene rings is 93.16 (3)°; the mol-ecule is C(2) symmetric.

6H,12H-5,11-Ethanodibenzo[b,f][1,5]diazocine

In the mol­ecule of the title compound, C₁₆H₁₆N₂, the ethano-strapped analogue of unsubstituted Tröger’s base, the dihedral angle between the two benzene rings is 75.85 (4)°, the smallest angle measured for an ethano-strapped analogue.

2,8-Dichloro-6H,12H-5,11-ethano-dibenzo[b,f][1,5]diazo-cine

In the mol-ecule of the title compound, C(16)H(14)Cl(2)N(2), the ethano-strapped 2,8-dichloro analogue of Tröger's base, the dihedral angle between the two benzene rings is 87.01 (3)°.

α-Amino acid Tröger base derivatives, possible conformationally restricted scaffolds?

The first synthesis of innovative alpha-amino acid conjugates of Tröger base is reported; their potential application as conformationally restricted scaffolds is proposed and has been investigated using high level ab initio calculations.