Stereoselective alkylation of the vinylketene silyl N,O-acetal possessing a chiral auxiliary has been achieved by using activated alkyl halides including allyl iodides, benzyl iodides, and propargyl iodide with Ag(I) ion in the presence of BF3·OEt2. The reaction proceeded to give reduced polyketides in high stereoselectivity. The synthesis of mycocerosic acid, a component of the cell envelope of Mycobacterium
Total Synthesis of the Triglycosyl Phenolic Glycolipid PGL-tb1 from<i>Mycobacterium tuberculosis</i>
作者:Santiago Barroso、Riccardo Castelli、Marc P. Baggelaar、Danny Geerdink、Bjorn ter Horst、Eva Casas-Arce、Herman S. Overkleeft、Gijsbert A. van der Marel、Jeroen D. C. Codée、Adriaan J. Minnaard
DOI:10.1002/anie.201206221
日期:2012.11.19
Complex: The synthesis of the glycolipid PGL‐tb1 present in the outer membrane of hypervirulent strains of Mycobacterium tuberculosis has been accomplished for the first time by using a highly convergent strategy featuring a Sonogashira coupling to unite a phenolic trisaccharide with the phthiocerol. Efficient asymmetric Cu‐catalyzed 1,4‐additions to unsaturated thioesters and cyclic enones have been
Totalsynthesis of phthiocerol dimycocerosate A (PDIM A), a virulent factor of Mycobacterium tuberculosis, has been achieved. Phthiocerol, a component of PDIM A, has been synthesized by subsequent ...
已实现了对结核分枝杆菌的毒力因子 phthiocerol dimycocerosate A (PDIM A) 的全合成。Phthiocerol 是 PDIM A 的一种成分,已通过后续的合成...
Compositions and methods for treatment of neoplastic disease
申请人:——
公开号:US20020177551A1
公开(公告)日:2002-11-28
The present invention comprises compositions and methods for treating a tumor or neoplastic disease in a host, The methods employ conjugates comprising superantigen polypeptides, nucleic acids with other structures that preferentially bind to tumor cells and are capable of inducing apoptosis. Also provided are superantigen-glycolipid conjugates and vesicles that are loaded onto antigen presenting cells to activate both T cells and NKT cells. Cell-based vaccines comprise tumor cells engineered to express a superantigen along with glycolipids products which, when expressed, render the cells capable of eliciting an effective anti-tumor immune response in a mammal into which these cells are introduced. Included among these compositions are tumor cells, hybrid cells of tumor cells and accessory cells, preferably dendritic cells. Also provided are tumoricidal T cells and NKT cells devoid of inhitory receptors or inhibitory signaling motifs which are hyperresponsive to the the above compositions and lipid-based tumor associated antigens that can be administered for adoptive immunotherapy of cancer and infectious diseases.
The present invention is an intravenous nutrient which contains a fatty acid ester of carbohydrate and water. The nutrient fluid contains a carbohydrate component and a fat component. has an excellent stability in solution, and is used in nutrient fluid therapy for individuals who cannot take food orally. The nutrient fluid is especially suitable as a high calorie intravenous nutrient.