摘要:
A 1,3-oxazin-4-one derivative, represented by general formula (I), which is useful as a herbicide because it has a wide herbicidal spectrum and a potent herbicidal activity and is highly safe for useful crops, wherein R1 represents lower alkyl, lower alkenyl, lower alkynyl, optionally substituted aryl or optionally substituted aralkyl; R2 represents hydrogen or lower alkyl; R3 represents lower alkyl, optionally substituted aryl or optionally substituted aralkyl; and R?4 and R5¿ represent each independently lower alkyl, or R?4 and R5¿ are combined with each other to represent, together with the carbon atom to which they are bonded, a 3- to 8-membered carbocyclic group which may have a lower alkyl branch.
摘要:
A process for preparing taxane derivatives such as taxol by providing a metal alkoxide having the bi, tri-, or tetracylic taxane nucleus, reacting the metal alkoxide with an oxazinone to form an intermediate, and converting the intermediate to the taxane derivative.
摘要:
Heterocyclic compounds selected from the group consisting of the compounds [IV] to [VII], [IX] and [X]. The heterocyclic compounds are useful for reactive materials in chemical industry and a process for producing the heterocyclic compounds.
摘要:
Process for the preparation of a taxol intermediate comprising contacting an alcohol with an oxazinone having the formula: wherein R₁ is aryl, heteroaryl, alkyl, alkenyl, alkynyl or OR₇ wherein R₇ is alkyl, alkenyl, alkynyl, aryl or heteroaryl; R₂ and R₅ are independently selected from hydrogen, alkyl alkenyl, alkynyl, aryl, heteroaryl, and OR₈ wherein R₈ is alkyl, alkenyl, alkynyl, aryl, heteroaryl, or hydroxyl protecting group; and R₃ and R₆ are independently selected from hydrogen, alkyl, alkenyl, alkynyl, aryl and heteroaryl.
摘要:
A substituted phenoxy urea having the formula:
wherein A is a halogen atom or a trifluoromethyl group, each of X, Y and Z is a hydrogen atom, a halogen atom or a trifluoromethyl group, R, is a C 1 -C 6 alkyl group, a lower alkoxyl group, a lower alkoxyl-substituted lower alkyl group, a cyclo-lower alkyl-substituted lower alkyl group, a lower alkenyl group, a lower alkynyl group, a lower haloalkyl group, a lower haloalkenyl group or a C 3 -C 9 non-aromatic cyclic hydrocarbon group, and R 2 is a hydrogen atom, a C 1 -C 6 alkyl group, a lower alkenyl group or a lower alkynyl group, or R 1 and R 2 form, together with the nitrogen atom to which they are bonded, a 3-8 member ring (which may be a bicyclo ring) which may contain a double bond or an oxygen atom within the ring and may have one or more branches.
摘要:
This disclosure describes novel 1,4-bis(substituted- amino)-5,8-dihydroxyanthraquinones and leuco bases thereof, useful as chelating agents and for inhibiting the growth of transplanted mouse tumors. This disclosure also describes compositions of matter useful as inhibitors of transplanted mouse tumor growth and the method of inducing the regression and/or palliation of leukemia and related cancers in mammals therewith.
摘要:
This disclosure describes novel 1,4-bis(substituted- amino)-5,8-dihydroxyanthraquinones and leuco bases thereof, useful as chelating agents and for inhibiting the growth of transplanted mouse tumors. This disclosure also describes compositions of matter useful as inhibitors of transplanted mouse tumor growth and the method of inducing the regression and/or palliation of leukemia and related cancers in mammals therewith.