Hoffman模型,Hoffman phantom
Maas-Hoffman modelMaas-Hoffman模型
1.The relations between relative dry weight of wheat and sugar beet and soil salt content confirmed to theMaas-Hoffman model.结果表明，小麦耐盐性略低于甜菜;Na+抑制小麦和甜菜对K+和Ca(2+)的吸收;小麦和甜菜的相对干物质重与土壤含盐量的关系符合Maas-Hoffman模型;小麦和甜菜叶Na+含量与土壤含盐量呈显著正相关，且与干物质重的关系也符合Maas—Hoffman模型。
3)Hoffman reactionHoffman
1.The reaction mechanism of one synthetic route isintroduced,which based on condensation of commercial available (S)-9,10-difluoro-3-methyl-2,3-dihydro-7-oxo-7-H-pyrido[1,2,3-de][1,4]benzoxazine-6-carboxylic ester with mucleophilic substitution,decarboxylation,cyclopropylation,hydrolysis andHoffman reaction.比较了以四氟苯甲酸为起始原料合成帕珠沙星的两种工艺路线,介绍了(S)-9,10-二氟-3-甲基-2,3-二氢-7-氧代-7-H-吡啶并[1,2,3 de][1,4]苯并恶嗪-6-羧酸乙酯为原料经亲核取代、脱羧水解、环丙基化、氰基水解和Hoffman重排等步骤合成帕珠沙星的反应机理,在相关机理分析的基础上对帕珠沙星的合成工艺提出了一些改进建议,并指出提高Hoffman重排反应收率、降低生产成本是帕珠沙星合成的主要研究方向。
4)Hoffman rearrangementHoffman降解
1.3-(Thiophen-2-yl)propanamide was then obtained in 99% yield by copper catalyzed reduction of the amide with hydrazineHoffman rearrangement of 3-(thiophen-2-yl)propanamide gav.3-(2-噻吩)丙烯酸与氯化亚砜和氨作用生成3-(2-噻吩)丙烯酰胺,收率91%;铜盐催化下用水合肼还原3-(2-噻吩)丙烯酰胺生成3-(2-噻吩)丙酰胺,收率99%;3-(2-噻吩)丙酰胺经Hoffman降解得2-(2-噻吩)乙胺,收率64%。
5)Hoffman ruleHoffman准则
6)Hoffman polynomialHoffman多项式
1.Given a positive integer p and a UPP-k digraph Γ,theHoffman polynomial and the spectrum of the generalized cycle C_pΓ are obtained.对UPP-k有向图Γ及任意正整数p,确定了Γ是广义圈CpГ的Hoffman多项式和谱;也对UPFL-k有向图给出了广义圈CpГ的Hoffman多项式及CkГ的谱的明确表达式。
延伸阅读
[3-(aminosulfonyl)-4-chloro-N-(2.3-dihydro-2-methyl-1H-indol-1-yl)benzamide]分子式：C16H16ClN3O3S分子量：365.5CAS号：26807-65-8性质：暂无制备方法：暂无用途：用于轻、中度原发性高血压。
