The twelfth and thirteenth centuries were to some extent a period of increasing occupational specialization. As towns grew, and money circulated more frequently, some groups of workers became more specialized, and as they did so their productivity is likely to have risen. However, this argument has limited value as evidence for rising aggregate levels of welfare. This article queries the extent of productivity gains attributable specifically to occupational specialization between 1100 and 1300, first by proposing that increasing specialization characterized only a small proportion of the workforce and secondly by arguing that there were offsetting trends elsewhere in the economy.
The twelfth and thirteenth centuries were to some extent a period of increasing occupational specialization. As towns grew, and money circulated more frequently, some groups of workers became more specialized, and as they did so their productivity is likely to have risen. However, this argument has limited value as evidence for rising aggregate levels of welfare. This article queries the extent of productivity gains attributable specifically to occupational specialization between 1100 and 1300, first by proposing that increasing specialization characterized only a small proportion of the workforce and secondly by arguing that there were offsetting trends elsewhere in the economy.
N,N‐Dimethylaminophenyl moiety is a common fragment in medicinal chemistry as several pharmaceuticals bearing this privileged motif are on the market and under clinical evaluation. Oxidative N‐demethylation is generally regarded as the major metabolic pathway. However, pharmacokinetics, metabolites studies as well as the further structural modification are precluded by the impracticality of chemical
Cobalt-Catalyzed Switchable Intramolecular Thioenolization/C–H Thiolation and C(sp<sup>2</sup>)–H/C(sp<sup>3</sup>)–H Dehydrogenative Coupling
作者:Zhi Yao、Zhongliang Cai、Long Zhen、Liqin Jiang
DOI:10.1021/acs.orglett.0c01514
日期:2020.6.5
C(sp2)–H/C(sp3)–H dehydrogenativecouplings of N-aryl-N-alkyl-thioamides are developed, providing 2-methylene-2,3-dihydrobenzo[d]thiazoles and thio-oxindoles in moderate to excellent yields from the same precursors, respectively. Details mechanistic studies suggest that the thioenolization/C–H thiolation process involves a radical mechanism, whereas the C(sp2)–H/C(sp3)–H dehydrogenativecoupling might proceed
Novel Compound, Photosensitive Resin Composition Comprising the Same, and Color Filter
申请人:Samsung SDI Co., Ltd.
公开号:US20170107224A1
公开(公告)日:2017-04-20
A compound represented by Chemical Formula 1 wherein each substituent is the same as defined in the specification, a photosensitive resin composition including the same, and a color filter manufactured using the photosensitive resin composition are provided.
EPOXY-OXETANE COMPOUND, METHOD FOR SYNTHESIZING SAME, AND USE OF SAID COMPOUND
申请人:SHIKOKU CHEMICALS CORPORATION
公开号:US20200270236A1
公开(公告)日:2020-08-27
The purpose of the present invention is to provide: a novel curable compound which can be expected to be used as a raw material for photocurable resins and thermosetting resins; a method for synthesizing said compound; a resin composition containing said compound; and a cured product thereof. This compound is an epoxy-oxetane compound represented by a formula, and this compound has a structure in which two epoxycyclohexyl groups (groups in which an oxirane ring and a cyclohexane ring are condensed) are bonded to an oxetane ring via a connector having one ether bond. In formula (I′), R
1
to R
3
may be the same as, or different from, each other, and each denote a hydrogen atom or a methyl group. n is 1 or 2.
Organic polymers having water contact angles of 20° or smaller, preferably 7° or smaller and equipped with both high wettability and high transparency. The organic polymers may contain as partial structures polar structures of about 3 debyes or higher in dipole moment and are available especially from polymerization of polymerizable compounds having alkylene(thio)urea structures.