Naphthyridine compounds and their use as inhibitors of HPK1 are described. The compounds are useful in treating HPK1-dependent disorders and enhancing an immune response. Also described are methods of inhibiting HPK1, methods of treating HPK1-dependent disorders, methods for enhancing an immune response, and methods for preparing the naphthyridine compounds.
Curacin A (1), a novel antimitotic agent, was synthesized in a highly stereo-controlled manner. The four stereoisomers of a partialstructure at the thiazoline moiety, 2 were also synthesized to aid in elucidation of the absolute configurations of three chiral centers in curacin A. The effects on porcine brain tubulin assembly of several synthetic compounds related to curacin A were examined.
Total synthesis of (+)-curacin A, a novel antimitotic metabolite from a cyanobacterium
作者:James C. Muir、Gerald Pattenden、Tao Ye
DOI:10.1039/b206796j
日期:2002.10.7
A concise total synthesis of (+)-curacin A, a potent antimitotic agent isolated from the cyanobacterium Lyngbya majuscula, is described. The synthesis features a new strategy to the 2-cyclopropyl-4-alkenyl substituted thiazoline unit in the natural product involving facile and selective thioacylation of the amino-alcohol 10 with the benzotriazole derived thioamide 11, leading to 28, as a key step. Cyclodehydration of 28 using Burgess' reagent then completed the synthesis of curacin A 1.
Totalsynthesis of curacin A, a novel antimitotic antiproliferative antibiotic, was achieved by the connection of C1C7, C8C17, and C18C22 segments. Enantioselective preparation of each segments were accomplished by asymmetric allylation, chiral synthon method, and asymmetric hydrolysis by using pig liver esterase, respectively.
Absolute configuration of curacin A, a novel antimitotic agent from the tropical marine cyanobacterium Lyngbya majuscula
作者:Dale G. Nagle、Robin S. Geralds、Hye-Dong Yoo、William H. Gerwick、Tae-Seong Kim、Mitch Nambu、James D. White
DOI:10.1016/0040-4039(95)00030-g
日期:1995.2
Curacin A is a structurally novel antimitotic agent isolated from the Caribbean cyanobacterium Lyngbyamajuscula. Its planar structure has been previously determined from a spectroscopic investigation. Here, we define the complete relative and absolute configuration of curacin A by comparison of products obtained from chemical degradation of the natural product with the same substances prepared by