Bismuth Triflate: An Efficient Catalyst for the Formation and Deprotection of Tetrahydropyranyl Ethers

Abstract

Carbon spheres are used as templates to prepare semiconductor hollow spheres of Ga2O3 (depicted) and GaN. The thickness and uniformity of the final products are predetermined by the thickness of the active layer of the carbon spheres. The diameter of the spheres can be adjusted in the range of 100 nm to 1.5 μm, which covers the band gaps in the spectral regime from UV to near infrared.

Bismuth(III) bromide in organic synthesis. A catalytic method for the allylation of tetrahydrofuranyl and tetrahydropyranyl ethers

“…Representative procedure: A homogeneous mixture of 2-(heptyloxy)tetrahydro-2H-pyran 12 (entry c) (0.300 g, 1.498 mmol), allyltrimethylsilane (0.291 g, 0.40 mL, 2.547 mmol, 1.7 equiv), and acetic anhydride (0.260 g, 0.24 mL, 2.547 mmol, 1.7 equiv) was stirred at rt under N2 as…”

Trends to Acid-Labile Cys Protecting Groups: Thp as an Efficient and Non-Aromatic Cys Protecting Group for Fmoc Chemistry

“…Apart of its recent application in Fmoc chemistry [26], Thp is extensively used as hydroxyl protecting group [27][28][29][30] as well as a linker [31][32][33][34], due to its chemical properties and its stability in strong bases, and acylating and alkylating agents among others. Accordingly, Thp is an excellent candidate for use in SPPS, but it is known that the main drawback should be the formation of a new stereocenter that leads to diastereomeric mixtures.…”

Peptides 2015, Proceedings of the 24th American Peptide Symposium

“…I found a 1973 paper by Kobayashi et al [30] that described a rather roundabout route to bis(chlorocarbonyl)disulfane, the reagent in the box. But look at the structure: it has all of the non-nitrogen atoms that make up Dts, plus two leaving groups -surely this would be a winner.…”