Synthesis of odorants in flow and their applications in perfumery

• Merlin Kleoff,
• Paul Kiler and
• Philipp Heretsch

Beilstein J. Org. Chem. 2022, 18, 754–768, doi:10.3762/bjoc.18.76

• formation of hydrazone 28. As one equivalent of water is formed in this condensation process, which is detrimental for the subsequent Shapiro reaction, water is continuously removed by in-line separation of the reaction mixture using a PTFE-membrane separator. The organic layer is then mixed with a solution

• of n-butyllithium in hexanes to initiate the Shapiro reaction of hydrazone 28 proceeding supposedly via dilithiated intermediate 29. As the nitrogen produced in the reaction increases the volume of the reaction mixture and therefore is drastically shortening the residence time, a cooled glass column

• ) via selective hydrogenation to enone 27, condensation to hydrazone 28 and subsequent Shapiro reaction. DMPS = dimethylpolysilane-modified platinum catalyst; Ts = tosyl. Selective hydrogenation of alkyne 31 to “leaf alcohol” 32 employing a solid-supported palladium catalyst. A) Synthesis of jasmonal

Synthesis of a deuterated probe for the confocal Raman microscopy imaging of squalenoyl nanomedicines

• Eric Buchy,
• Branko Vukosavljevic,
• Maike Windbergs,
• Dunja Sobot,
• Camille Dejean,
• Simona Mura,
• Patrick Couvreur and
• Didier Desmaële

Beilstein J. Org. Chem. 2016, 12, 1127–1135, doi:10.3762/bjoc.12.109

• -Sud, 5, rue Jean-Baptiste Clément, 92296 Châtenay-Malabry, France 10.3762/bjoc.12.109 Abstract The synthesis of ω-di-(trideuteromethyl)-trisnorsqualenic acid has been achieved from natural squalene. The synthesis features the use of a Shapiro reaction of acetone-d6 trisylhydrazone as a key step to

• : deuterium labelling; nanomedicine; Raman spectroscopy; Shapiro reaction; squalene; Introduction Application of nanotechnology to medicine holds promises to profoundly impact healthcare especially to treat severe diseases such as cancer, intracellular infections, neurodegenerative diseases, etc. Indeed, the

• [36]. Having secured an efficient method to reinstall the isopropylidene end-group, we turned our attention to the application of this method to a two-end functionalized squalene derivative. However, when applied to dialdehyde 5 the Shapiro reaction led to a mixture of starting material (30%), allylic