Reductive Monoalkylation of Aromatic and Aliphatic Nitro Compounds and the Corresponding Amines with Nitriles
作者:Ruel Nacario、Shailaja Kotakonda、David M. D. Fouchard、L. M. Viranga Tillekeratne、Richard A. Hudson
DOI:10.1021/ol047580f
日期:2005.2.1
[reaction: see text] A simple, selective, rapid, and efficient procedure for the synthesis of secondary amines from the reductive alkylation of either aliphatic or aromatic nitro compounds and the corresponding amines is reported. Ammoniumformate is used as the hydrogen source and Pd/C as the hydrogen transfer catalyst. The reaction is carried out at room temperature. The rate differences for the preferential
Assembly of Substituted 2-Alkylquinolines by a Sequential Palladium-Catalyzed CN and CC Bond Formation
作者:Yoshio Matsubara、Saori Hirakawa、Yoshihiro Yamaguchi、Zen-ichi Yoshida
DOI:10.1002/anie.201102076
日期:2011.8.8
Diversity: A range of substituted 2‐alkylquinolines can be prepared in a general and efficient synthetic approach that employs mild reaction conditions (see scheme). The synthesis is based on a sequential palladium‐catalyzed CN and CCbondformation, followed by palladium‐catalyzed aromatization, and results in the formation of the desired compounds in one step.
Formation of N-heterocycles by the reaction of thiols with glyoxamides: exploring a connective Pummerer-type cyclisation
作者:Marc Miller、Johannes C. Vogel、William Tsang、Andrew Merrit、David J. Procter
DOI:10.1039/b816608k
日期:——
The reaction of thiols with glyoxamides provides a convenient method for the generation of thionium ions and the initiation of Pummerer-typereactions. When the glyoxamides contain tethered aromatic nucleophiles, N-heterocycles are formed by a thionium ion cyclisation. The scope and mechanism of the connective Pummerer-type process has been investigated using a range of thiols, Lewis acids and both
Compounds having the structure or their salts: are used to treat or reduce le likelihood of acquiring androgen-dependent diseases, such as prostate cancer, benign prostatic hyperplasia, polycystic ovarian syndrome, acne, hirsutism, seborrhea, androgenic alopecia and male baldness. They can be formulated together with pharmaceutically acceptable diluent or carrier or otherwise made into any pharmaceutical dosage form. Some of these compounds having tissue-specific antiandrogenic activity and tissue-specific androgenic activity can be used to treat or reduce the risk of developing diseases related to loss of androgenic stimulation. Combinations with other active pharmaceutical agents are also disclosed.
Mechanistic Insight Leads to a Ligand Which Facilitates the Palladium-Catalyzed Formation of 2-(Hetero)Arylaminooxazoles and 4-(Hetero)Arylaminothiazoles
作者:Esben P. K. Olsen、Pedro L. Arrechea、Stephen L. Buchwald
DOI:10.1002/anie.201705525
日期:2017.8.21
By using mechanistic insight, a new ligand (EPhos) for the palladium‐catalyzed C−N cross‐coupling between primary amines and aryl halides has been developed. Employing an isopropoxy group at the C3‐position favors the C‐bound isomer of the ligand‐supportedpalladium(II) complexes and leads to significantly improved reactivity. The use of a catalyst system based on EPhos with NaOPh as a mild homogeneous