—— Product Specifications ——

—— Product Detail ——

• • • • • • • • • • • • • • • • • • • • • • • Product Overview

                                              Boc-L-4,5-dehydroleucine is a protected unsaturated amino acid derivative with the molecular formula C₁₁H₁₉NO₄ and a molecular weight of 229.27 g/mol. This white to off-white crystalline powder features the Boc-protected amino group and an unsaturated side chain (alkene) at the 4,5-position of the leucine skeleton. The presence of the alkene provides a versatile handle for further functionalization through a variety of transformations including epoxidation, hydroboration, and cycloaddition reactions. This building block is valuable in peptide synthesis for the introduction of reactive side chains that can be subsequently modified.

                                              Synthetic Process

                                              Boc-L-4,5-dehydroleucine is synthesized through the following routes:

                                              • Boc protection of L-4,5-dehydroleucine: L-4,5-Dehydroleucine is reacted with di-tert-butyl dicarbonate (Boc₂O) in the presence of a base to protect the amino group.

                                              • Purification: The crude product is purified by recrystallization or column chromatography.

                                              Mechanism of Action / Application Principles

                                              • Peptide Synthesis: Serves as a building block for introducing unsaturated leucine residues into peptide sequences.

                                              • Bioactive Compound Research: Used in the synthesis of natural product analogues and bioactive peptides.

                                              • Chemical Modification: The alkene enables post-synthetic modification of peptides via epoxidation, hydroboration, and other reactions.

                                              Quality Specifications

                                              
                                              

                                              
                                              

                                              Parameter	Specification
                                              Assay	≥98.0%
                                              Appearance	White to off-white crystalline powder
                                              Loss on Drying	≤0.5%
                                              Residue on Ignition	≤0.1%

                                              Each batch is accompanied by a Certificate of Analysis (COA).

                                              Packaging & Storage

                                              • Research quantities: 100mg, 500mg amber glass vials

                                              • Bulk quantities: 1g, 5g HDPE containers

                                              Storage conditions: Store in a cool, dry place in tightly sealed containers. Under recommended conditions, shelf life is 24 months.

— C ompany Profile ——

Jinan Topfull Chemical Co., Ltd. is an international company rooted in China, specializing in the export of chemical products.

Our company is committed to making every effort to provide ideal chemical products to potential customers worldwide, including but not limited to: organic/inorganic reagents, biological reagents, plant extracts, pharmaceutical intermediates, active pharmaceutical ingredients (APIs), reference standards, reference substances, peptides, and more. Meanwhile, we have established long-term and stable cooperative relationships with university laboratories and off-campus research institutions, enabling us to offer tailored product services based on customers' actual needs.

We currently support customized services for most product categories, with supply quantities ranging from milligram (mg), gram (g) to kilogram (kg) levels, as well as wholesale. Product purity covers the full spectrum from 90% to 99.9%, providing customers with one-stop convenient services.

To date, our products have been exported to developed countries such as the United States, Australia, Canada, Mexico, as well as EU member states including France, Germany, and many other countries and regions such as Nigeria, Ghana, Southeast Asia, and other parts of Asia. Our product quality and services have consistently received high praise.

Looking ahead, our company will continue to serve as a bridge connecting China and the world, delivering high-quality products and services to global customers.

—— Q&A ——

Q1: How to confirm the product quality before placing orders?
A: By sending you available samples. Or if you have special requirements for the goods, we can prepare samples according to your requirements for confirmation.

Q2: Can you supply free samples?
A: Yes, we can provide a free sample, but the shipping cost will be paid by the customers. You can either pay the shipping cost or arrange a courier to collect the samples.

Q3: How do you treat quality complaints?
A: All our products are strictly tested by our QC and confirmed by QA; unqualified material will not be released to customers. If any quality problem is confirmed to be caused by us, we will replace the goods or refund your payment immediately.

Q4: What is your MOQ? Is there a discount?
A: For highvalue products, our MOQ starts from 1g and generally starts from 10g. For other lowprice products, our MOQ starts from 100g and 1kg.
Q: Is there a discount?
A: Yes, for larger quantities, we always support with better prices.

Q5: How to start orders or make payments?
A: You can send us your Purchase Order (if your company has one), or just send a simple confirmation by email or via Trade Manager. We will then send you a Proforma Invoice with our bank details for your confirmation, and you can make payment accordingly. If you have other preferred payment methods, we are open to discussion and negotiation.