Guntupalli Venkata Lakshmi Narasimha Rao is an Indian politician of the Bharatiya Janata Party (BJP). [1] . He was a member of the Rajya Sabha, the upper house of Indian Parliament, representing the state of Uttar Pradesh.

γ-Valerolactone (GVL) or gamma-valerolactone is an organic compound with the formula C 5 H 8 O 2. This colourless liquid is one of the more common lactones. GVL is chiral but is usually used as the racemate. It is readily obtained from cellulosic biomass and is a …

2025年2月1日 · Ring-opening transesterification of bio-based γ-valerolactone (GVL) to produce a mixture of methyl pentenoate isomers (MPs) such as methyl 4-pentenoate (M4P), methyl 3-pentenoate (M3P) and methyl 2-pentenoate (M2P) has been carried out using modified Zr-containing catalysts in a gas phase continuous process.

GVL is a green solvent used in Fmoc-based solid-phase peptide synthesis. It is susceptible to ring opening in the presence of bases such as piperidines, which are used to remove the Fmoc protecting group. Here we studied the formation of the corresponding acyl piperidides by time-dependent monitoring using NMR.

2025年1月1日 · Gamma-valerolactone (GVL) has been converted into a mixture of methyl pentenoate isomers (MPs) in presence of methanol using Zr/SiO 2 catalysts. These isomers are valuable precursors in fine chemistry and for polymer production.

Gamma-valerolactone is a butan-4-olide that is dihydrofuran-2 (3H)-one substituted by a methyl group at position 5. It has been found in the urine samples of humans exposed to n-hexane. It has a role as a flavouring agent and a human xenobiotic metabolite.

In the present study, γ-valerolactone (GVL) is firstly reported to be converted into aromatic hydrocarbons through catalytic pyrolysis. The catalysts and reaction conditions are both critical in maximizing the hydrocarbon selectivity. Four zeolites, i.e. MCM-41, β …

2017年7月26日 · GVL is a naturally available chemical 24 and has recently been described as an excellent green solvent candidate. 25 As demonstrated in detail by Horvath and co-workers, 24 GVL is renewable, has a low mp (−31 °C), high bp (207 °C), a definitive but acceptable smell for easy recognition of leaks and spills, non-toxicity and high solubility ...

2019年11月5日 · GVL is a green solvent used in Fmoc-based solid-phase peptide synthesis. It is susceptible to ring opening in the presence of bases such as piperidines, which are used to remove the Fmoc protecting group. Here we studied the formation of the corresponding acyl piperidides by time-dependent monitoring using NMR.

2018年3月4日 · Data corresponds to the period from 01-06-2009 to 20-03-2025.