Thermal generation of acylketenes in diol-containing substrates results in dual macrocyclization/pyran-hemiketal formation. This transformation expands the scope of acylketene macrolactonizations and their application to the synthesis of complex macrolides. Triol and even tetrol substrates also have been closed in highly regioselective fashion. Additionally, the challenging macrolactonization of a tertiary alcohol was achieved.
Tandem RCM-Pauson–Khand reaction for access to tricycles in one stepElectronic supplementary information (ESI) available: spectral data and 1H-NMR and 13C-NMR spectra for compounds 8, 10, 11, 14a and 14b. See http://www.rsc.org/suppdata/ob/b3/b302277c
The combination of ring-closing metathesis (RCM) followed by an intramolecular Pauson–Khandreaction gives direct entry to tricyclic compounds. The RCM was carried out on a hexacarbonylcobalt-complexed alkyne, this complex acting as a protecting group against enyne metathesis. The procedure was studied for dienynes containing heteroatoms and allows the building of [6,5,5] and [7,5,5] tricyclic systems
Silicone compounds comprising a ketone or aldehyde benefit agent moiety
申请人:The Procter & Gamble Company
公开号:US10590148B2
公开(公告)日:2020-03-17
Silicone compounds, delivery compositions, compositions, packaged products and displays comprising such silicone compounds, and processes for making and using such benefit agent delivery compositions, compositions, packaged products and displays. Such compositions have improved deposition and retention properties that may impart improved benefit characteristics to a composition and/or situs.
Silicone compounds comprising a benefit agent moiety
申请人:The Procter & Gamble Company
公开号:US11192904B2
公开(公告)日:2021-12-07
Silicone compounds, delivery compositions, compositions, packaged products and displays comprising such silicone compounds, and processes for making and using such benefit agent delivery compositions, compositions, packaged products and displays. Such compositions have improved deposition and retention properties that may impart improved benefit characteristics to a composition and/or situs.
Compositions that include siloxane compounds having pendant silyl ether moieties
申请人:The Procter & Gamble Company
公开号:US11447724B2
公开(公告)日:2022-09-20
Consumer product compositions that include siloxane compounds having pendant silyl ether moieties, which may include perfume raw material fragments. Such siloxane compounds. Methods related to such compounds and compositions.