78038-79-6Relevant articles and documents
Solution-phase synthesis and evaluation of tetraproline chiral stationary phases
Dai, Zhi,Ye, Guozhong,Pittman Jr., Charles U.,Li, Tingyu
experimental part, p. 329 - 338 (2012/05/20)
A protocol was developed for the solution-phase synthesis of multigram amounts of two 9-fluorenylmethoxycarbonyl (Fmoc)-protected tetraproline peptides. These tetraproline peptides were then attached to amino derivatized silica gel. The replacement of the Fmoc group with the trimethylacetyl group lead to two tetraproline chiral stationary phases (CSPs). A comparison of the chromatographic behavior of these two solution-phase-synthesized tetraproline CSPs with that prepared by stepwise solid-phase synthesis revealed that all three had similar chromatographic performance for resolving 53 model analytes. This suggests that the solution-phase synthesis of oligoprolines, which allows for the specific benefits of good batch reproducibility, selector homogeneity, and possibly low cost, is a feasible alternative to the solid-phase synthesis of oligoproline CSPs. Copyright
Reductive ring opening of dihydrodibenzothiepine and dihydrodinaphtho- oxepine and -thiepine
Foubelo, Francisco,Moreno, Benjamín,Soler, Tatiana,Yus, Miguel
, p. 9082 - 9096 (2007/10/03)
The 4,4′di-tert-butylbiphenyl (DTBB)-catalysed lithiation of dihydrodibenzothiepine (1) at -78°C for 30 min followed by reaction with a carbonyl compound [tBuCHO, Ph(CH2)2CHO, PhCHO, (n-C5H11)2/
C2 Symmetric Amines. II. Asymmetric Synthesis of C2 (3S,3'S)-and (3R,3'R)Dimethyl 4H-DinaphthAzepines
Meyers, A. I.,Nguyen, Thanh H.
, p. 5873 - 5876 (2007/10/02)
The C2-symmetric dimethyl amines (1a, 1b) were prepared in high stereoselectivity by carbanion alkylation of their respective formamidines.