نتایج جستجو برای: Naphthols

تعداد نتایج: 506  

2011
Xiao-hua CAI Hui GUO Bing XIE

One-pot multicomponent condensation of β-naphthol, aromatic aldehydes, acetamide or urea in the presence of potassium hydrogen sulfate was carried out under solvent-free condition to afford amidoalkyl naphthols in 83%~96% yields.

Amidoalkyl-2-naphthols as synthetic intermediates play an important role in medicinal chemistry due to their remarkable biological and many pharmacological properties. Owing to the versatile biological activities, industrial and synthetic applications of these compounds, introduction of an alternative methodology is urgent in synthetic organic chemistry. Low yield and harsh reaction conditions ...

Journal: :iranian journal of catalysis 2015
rajesh singh renu bala robita duvedi sahil kumar

amidoalkyl-2-naphthols as synthetic intermediates play an important role in medicinal chemistry due to their remarkable biological and many pharmacological properties. owing to the versatile biological activities, industrial and synthetic applications of these compounds, introduction of an alternative methodology is urgent in synthetic organic chemistry. low yield and harsh reaction conditions ...

Journal: :Chemical communications 2008
Shinobu Takizawa Tomomi Katayama Chiaki Kameyama Kiyotaka Onitsuka Takeyuki Suzuki Takeshi Yanagida Tomoji Kawai Hiroaki Sasai

Preparation and structural analysis of chiral dinuclear vanadium(v) catalysts with high catalytic activity for the oxidative coupling of 2-naphthols are described.

Amidoalkyl-2-naphthols as synthetic intermediates play an important role in medicinal chemistry due to their remarkable biological and many pharmacological properties. Owing to the versatile biological activities, industrial and synthetic applications of these compounds, introduction of an alternative methodology is urgent in synthetic organic chemistry. Low yield and harsh reaction conditions ...

Journal: :Chemical communications 2010
Hao Xu Shangfu Li Hongxia Liu Hua Fu Yuyang Jiang

A simple and efficient copper-catalyzed method for synthesis of naphthols containing multifunctional groups has been developed under mild conditions (room temperature to 60 °C), and it can tolerate various functional groups.

Journal: :Chemical science 2015
Qin Yin Shou-Guo Wang Xiao-Wei Liang De-Wei Gao Jun Zheng Shu-Li You

An organocatalytic asymmetric chlorinative dearomatization of naphthols was realized for the first time, providing chiral naphthalenones with a Cl-containing all-substituted stereocenter in excellent yields and enantioselectivity (up to 97% yield and 96% ee). The reaction features mild reaction conditions, good tolerance of diverse functional groups and simple reaction operation.

Journal: :Chemical communications 2015
Stephen J Murray Hasim Ibrahim

Enantiopure C2-symmetric iodoarenes based on the rigid all-carbon anti-dimethanoanthracene framework are shown to catalyse the asymmetric oxidative Kita spirolactonisation of propanoic acid-tethered 1-naphthols with significant levels of asymmetric induction of up to 67% ee.

Journal: :Environmental Health Perspectives 2003
Berrin Serdar Peter P Egeghy Suramya Waidyanatha Roger Gibson Stephen M Rappaport

Benzene, naphthalene, and 1- and 2-naphthol were measured in urine samples obtained from 322 U.S. Air Force personnel categorized a priori as likely to have low, moderate, or high exposure to jet fuel [jet propulsion fuel-8 (JP-8)]. In postexposure samples, levels of these analytes in the high-exposure group were 3- to 29-fold greater than in the low-exposure group and 2- to 12-fold greater tha...

Journal: :Journal of occupational health 2004
Grazyna Bieniek Slawomir Kurkiewicz Tadeusz Wilczok Katarzyna Klimek Longina Swiatkowska Agnieszka Lusiak

The objective of the study is to assess the external and internal exposures to aromatic hydrocarbons in the tar and oil naphthalene distillation processes at a coke plant. 69 workers engaged as operators in tar and oil naphthalene distillation processes and 25 non-exposed subjects were examined. Personal analyses of the benzene, toluene, xylene isomers, ethylbenzene, naphthalene, indan, indene ...

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