76529-42-5Relevant articles and documents
Radical photocyclization route for macrocyclic lactone ring expansion and conversion to macrocyclic lactams and ketones
Nishikawa, Keisuke,Yoshimi, Yasuharu,Maeda, Kousuke,Morita, Toshio,Takahashi, Ichiro,Itou, Tatsuya,Inagaki, Sho,Hatanaka, Minoru
, p. 582 - 589 (2013)
A new method for the synthesis of macrocyclic lactones, lactams, and ketones, which utilizes photoinduced intramolecular radical cyclization reactions of substrates containing tethered carboxylic acids and α,β-unsaturated carbonyl moieties, has been uncovered. Photocyclization of the carboxylic acids tethered acrylate ester, which were prepared starting from the macrocyclic lactones, gave the two-carbon elongated macrocyclic lactones via decarboxylation. Similar photoreactions of carboxylic acid tethered acryl amide or α,β-unsaturated ketone moieties, which were also prepared starting from the macrocyclic lactones, produced macrocyclic lactams or ketones, respectively. The simple approach can be readily applied to the preparation of a variety of macrocyclic lactones, lactams, and ketones with tunable ring sizes.
Improved Method for the Synthesis of Palmitic Acid
Hostetler, Eric D.,Fallis, Stephen,McCarthy, Timothy J.,Welch, Michael J.,Katzenellenbogen, John A.
, p. 1348 - 1351 (1998)
-
Synthesis of 23-, 25-, 27-, and 29-Membered (Z)-Selective Unsaturated and Saturated Macrocyclic Lactones from 16- and 17-Membered Macrocyclic Lactones and Bromoalcohols by Wittig Reaction, Yamaguchi Macrolactonization, and Photoinduced Decarboxylative Radical Macrolactonization
Iwasaki, Tomoya,Tajimi, Yuka,Kameda, Kenta,Kingwell, Callum,Wcislo, William,Osaka, Kazuyuki,Yamawaki, Mugen,Morita, Toshio,Yoshimi, Yasuharu
, p. 8019 - 8026 (2019/06/27)
A new strategy for the synthesis of 23-, 25-, 27-, and 29-membered (Z)-selective unsaturated and saturated macrocyclic lactones from commercially available 16- and 17-membered macrocyclic lactones and bromoalcohols by Wittig reaction, Yamaguchi macrolactonization, and photoinduced decarboxylative radical macrolactonization is described. The position of the unsaturated part in the macrocyclic lactones can be controlled by changing the number of carbons in the starting materials. This protocol can provide facile access to the desired large-ring (Z)-selective unsaturated and saturated macrocyclic lactones from simple starting materials.
Synthetic access to arsenic-containing phosphatidylcholines
Guttenberger, Nikolaus,Glabonjat, Ronald A.,Tassoti, Sebastian,Francesconi, Kevin A.
, p. 2651 - 2653 (2017/06/14)
We wish to disclose the first synthesis of 1-O-hexadecanoyl-2-O-((15-(dimethylarsinoyl)pentadecanoyl)oxy)-sn-glycero-3-phosphocholine, which belongs to the group of arsenic-containing phosphatidylcholines (AsPCs), recently discovered in herring caviar. The synthesized product will serve as a model compound to study biological and toxicological properties of arsenolipids in food.
Mapping the Binding Motifs of Deprotonated Monounsaturated Fatty Acids and Their Corresponding Methyl Esters within Supramolecular Capsules
Wang, Kaiya,Gibb, Bruce C.
, p. 4279 - 4288 (2017/04/27)
A suite of NMR techniques revealed that a cavitand (1) formed 2:1 host-guest complexes with a range of monounsaturated fatty carboxylates and their corresponding methyl esters. All of the carboxylates bound to the capsule in a J-shaped motif with the carboxylate at the equatorial region of the dimeric capsule, and the reverse turn of the chain and the methyl terminal in each polar region of the host. Guest exchange was slow on the NMR time scale, while tumbling was slow or close to the NMR time scale depending on the position and stereochemistry of the double bond. In contrast, the methyl esters were found to bind in three motifs depending on the position and stereochemistry of the double bond. Thus, the esters were observed to bind in a J-shaped, U-shaped (the turn in the guest occupying a polar region and the two termini competing for occupancy of the other pole), or a reverse J-shaped motif (ester moiety and turn each occupying a pole and the methyl terminal located near the equator). Relative binding constant (Krel) determinations revealed that the affinity for the capsule was dependent on the position and stereochemistry of the double bond.
