Reciprocal polyhedra and the Euler relationship: cage hydrocarbons, C_nH_n and closo-boranes [B_xH_x]²⁻

• Michael J. McGlinchey and
• Henning Hopf

Beilstein J. Org. Chem. 2011, 7, 222–233, doi:10.3762/bjoc.7.30

• and will remain at the forefront of alicyclic chemistry until a stepwise synthesis of C60 is achieved. However, we note en passant that Scott, de Meijere and their colleagues have devised a rational route to C60 from a chlorinated precursor, C60H27Cl3, in which only the final ring closures were

Expanding the gelation properties of valine-based 3,5-diaminobenzoate organogelators with N-alkylurea functionalities

• Hak-Fun Chow and
• Chin-Ho Cheng

Beilstein J. Org. Chem. 2010, 6, 1015–1021, doi:10.3762/bjoc.6.114

• properties were extended from only aromatic solvents, to a wide range of other types of solvents such as alicyclic hydrocarbons, alcohols and polar solvents such as DMSO and DMF. It was also found that a longer N-alkylurea chain conferred improved gelation power and higher thermal stability as compared to

• alicyclic hydrocarbon, alcohols and even polar aprotic solvents such as DMSO and DMF by replacing the Cbz group with an N-alkylurea functionality (e.g., 2). In addition, the length of the alkyl chain –(CH2)nMe also exhibited some interesting effects on their gelation ability [15]. Results and Discussion

• alcoholic solvents and translucent gels in alicyclic hydrocarbon solvents, respectively. Hence, the range of the solvents that these new compounds can gel was significantly expanded by replacing the Cbz group with an N-alkylurea functionality. Based on these experiments, organogelators 2 with longer